MarionCenterSpeedway “TheThrillOnTheHill”              Racing Saturday Night at 7:30 Race Day Hotline (724)427-4348

Hot Street Diesel

The rules promulgated in these rules are intended as guidelines for the diesel 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against

injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment

throughout the season meet the requirements for this class.

The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may

be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the

inspecting area.

R E G U L A T I O N S

Weight  --  Maximum 8500 lbs. with driver.

No duels on rear on non-dually

No hood stacks

No air to water intercooler

Hanging weight allowed

Solid rear suspension allowed but not trussed/welded – has to be removable.

Fuel only

E V E N T   O P E R A T I O N

DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT

PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK.

Modified Street Legal Gas Truck

The rules promulgated in these rules are intended as guidelines for the 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or

death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout

the season meet the requirements for this class.

The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may

be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the

inspecting area.

R E G U L A T I O N S

Maximum 6300 lbs. with driver.

26 inch hitch height.

Hanging weight allowed.  No more than 24 inches from farthest forward point

Bolt in blocks allowed only.

Must have 3 leaf springs, EOM suspension.

Must have 1 inch downward movement at all times.

Maximum 35 x 12.50 tires.

Open headers are allowed.

Race fuel allowed.  NO Q16 or Oxidizers.

Single carb.

All engine accessories belt driven.  No electrical driven.

OEM wheel base

Drive line must match vehicle model

1 ton or less.  No duel wheels.

Battery in factory location.

Hook point farthest point to back of truck.

Style hitch

Current license & inspection.

No solid suspensions are permitted.  Suspension must have a minimum of 1 inch of downward movement at all times.  Driver must be able to demonstrate FREE

downward movement with no use of mechanical advantage.  No ratchet straps, binders or other mechanical means.  No blocks are allowed between axle housing and

truck frame that would restrict the necessary 1 inch of movement.  If a truck has airbags, the system must be disabled.  Traction bars are permitted if they are only bolt

on and completely removable.  Traction bars must be pivotal.

E V E N T   O P E R A T I O N

DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT

PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK.

Open Street Gas Truck

The rules promulgated in these rules are intended as guidelines for the 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or

death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout

the season meet the requirements for this class.

The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may

be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the

inspecting area.

R E G U L A T I O N S

Maximum 6300 lbs. with driver.

26 inch hitch height.  Hitch 27% of wheel base.

 Hanging weight 60 inches from center front axle.

Open on engine and add on parts (heads, intake, single carb)

No cut tires.

No V-bars.

Maximum 35 x 12.50 tires.

Race fuel only.  No Alcohol.

Battery, fuel, pump, elet allowed on weight box.

Kill switch when pulled must shut down fuel pump and ignition.

Safety:  if not licensed and insured, must have fire jacket and helmet.

Drive shaft loops required on trucks not licensed for street.

Auto trans blanket on non-licensed trucks.

Must have Bloof proof bell housing.

E V E N T   O P E R A T I O N

DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT

PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK.

Outlaw 4wds

The rules promulgated in these rules are intended as guidelines for the diesel 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against

injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment

throughout the season meet the requirements for this class.

The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may

be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the

inspecting area.

R E G U L A T I O N S

Weight  --  Maximum 8000 lbs. with driver.

Weights  --  Added weights are permitted.  Hanging weights may not extend more than 60 inches from the centerline of the front axle.  Any loss of ballast while

hooked to the sled is cause for disqualification.  No fuel or water may be added to the truck after it has crossed the scales.

Batteries  --  The batteries must be securely mounted.  They may not be located in the driver compartment.

Body & Frame  --  A tube frame is permitted.  A fiberglass body with working doors and complete firewall that seals the driver compartment is acceptable.

Driveline  --  After market transmissions and transfer cases are permitted.  Axle shields are required and will be .060 inch thickness in steel or aluminum.  Shield

shall not be mounted to axle ends or hub bolts.  An access hole may be left open to allow locking in the hubs.

Driveshaft Loops  --  All trucks must have at least 6 inch wide u-joint shields around the rear u-joints constructed of at least 1/4 inch steel or 3/8 inch aluminum that

will safely contain the u-joint and the ends of each shaft.  In addition there will be at least one shaft loop in the middle of the drive shaft.  All shields must be securely

mounted to the vehicle.  Any front shaft u-joint that is visible from the side of the truck must be shielded to contain the u-joint and the end of the shaft.

Engine: Gasoline or Alcohol  --  Engines may utilize a single super charger or a single turbo charger.  Screw type blowers are not permitted.  Fuel injection is

permitted.  Aluminum blocks and aluminum heads are permitted.  Bore spacing may be altered.  All NTPA necessary safety equipment and restraints on the super

charger must be followed.  A single turbo charger is also permitted in this configuration.  Super charged or turbo charged engines are limited to 572 cubic inches. 

Hood stacks allowed.

Engine: Diesel  --  Engines are restricted to 6 cylinder and 8 cylinder compression ignition engines.  Class maximum of 450 cubic inches will be enforced.  Diesel

engine must have been available in a one tone or less truck from the factory.  Sigma fuel pumps are permitted.  Water injection is permitted.  The fuel must be pump

#1/#2 diesel only.  Soy or Bio-diesel fuel is permitted.  No Alcohol for fuel.  Diesel engines may use an unlimited size single (1) turbo charger.  A diesel engine

running without a muffler must have cross bolts installed in their exhaust system.

 Hood stacks allowed

E X C E P T I O N:  Any diesel truck running more than turbo chargers in any configuration will hook with a 24 inch drawbar at 7600 pounds.

All inline turbocharged engines must have one cable totally surrounding the engine block and head.

·The cable will be 3/8 inch diameter

·Cable must have minimum of two clamps at all splices

·Cable will have 4 inches to 6 inches of slack

Master Cutoff: Diesel Engine  --  A sled- and driver- operated spring loaded emergency air shut off is mandatory.  The cable must terminate into a 2 inch diameter

steel ring.

Fuel Cutoff:  Diesel Engine  --  All trucks must be equipped with a driver operated fuel shutoff capable of blocking fuel flow to the injections pump.  A three way

dump valve is required.

Floor  --  Each vehicle in competition must be equipped with an OEM floor pan or a minimum 0.024 inch steel floor pan or lexan that extends the full length and width

of the driver seating area.  Non-OEM floor pans must have cross members (minimum 2 inch by 2 inch, 0.083 inch wall thickness square tubing) installed between the

frame rails for proper seat and driver restraint system installation and support.  All openings must be sealed with metal0excluding grommets.  The use of fiberglass

and/or magnesium is prohibited.  The vehicle must be equipped with one seat for the driver; it must be properly installed.

Firewall  --  Each vehicle must be equipped wit and EOM or minimum 0.024 inch steel or lexan firewall, extending from side to side of the body and from the top of

the engine compartments upper seal (hood, cowl, or deck) in the bottom of the floor and/or belly pan.  The firewall must provide a bulkhead between the engine

and/or fuel tank and driver compartment.  All openings must be sealed with metal-excluding grommets.  The use of magnesium is prohibited.

Flywheel Shield  --  All vehicles equipped with a manual transmission must have a flywheel shield labeled as meeting minimum SFI Spec 6.3 or greater.  Applications

for which an SFI Spec flywheel shield is not available may use a properly attached SFI 4.1 or 4.2 blanket that completely covers the bell housing may be used in

place of the shield; it must be attached to the block and extend rearward to the transmission with a minimum 6 inch overlap where it is fastened.

Safety  --  Fire suits are required at a minimum of SFI 3.2.  In flip top bodied vehicles without a firewall or working doors, the driver will be required to wear an SFI

approved suit.  Driver must wear a helmet meeting SNELL 85, 90, 95, 2000, K98, or SFI Spec 31.1.  A fire extinguisher system is permitted.  It must be securely

mounted.

Driver Restraint System  --   The OEM restraint system is mandatory and must be worn.  A five point safety harness is highly recommended in the class.

Exhaust  --  The exhaust on a GASOLINE or ALCOHOL vehicle may exit downward at the back of the truck or directly out the back of the truck or straight up through

the hood of the truck or straight up at the back of the cab.  All DIESEL vehicles must be equipped so as to direct exhaust upward.  Exhaust through the hood is

permitted.  Tow 3/8 inch diameter bolts must be placed in a cross pattern within 1 inch of each other as close to the final turbo as is practical.

Other Fuel & Additives  --  Propane is prohibited on any engine.  Other oxygen extenders are prohibited such as propylene oxide additives.  Racing fuel is permitted

but not oxygenated racing fuel such as VP113 and Q16.  System components used for these banned substances must be fully removed from the truck.  Fuel checks

may be taken at any time by the officials.

Nitrous Oxide  --  Nitrous Oxide is permitted for use on any naturally aspirated gasoline engine.  This may not be used with alcohol or with any turbo charged or

super charged engine.

Hitch  --  The hitch must be constructed of solid material that is properly attached and braced.  The hooking point must be at least 3.75 inches by 3.5 inches.  The

length of the hitch measured from the center of the rear axle to the hitch point may be no shorter than 27% of the actual wheelbase of the truck.  The hitch must be

horizontal to the ground and stationary in all directions.  The hooking point must have a minimum 3.750 inch inside diameter opening for the sled hook.  The

hooking point will be measured to the center of the clevis loop.  The area where the hook point is at must be free and clear of nay obstructions.  No lever, pivot, axis

or other types of ‘trick’ hitches are prohibited.  No vertical hitches, all hitches must be 33 degrees or less parallel to the ground  A second hitch is not required in this

class.  Owners of trucks with a second hitch must assure that the second hitch is ‘taped off’ – this is the owner’s responsibility.  The hooking point will be measured

to the rear of the opening in the clevis/hook.

Interior  --  A complete interior, including dashboard, door panels, headliner, etc., is mandatory.  Two matching front sears are mandatory.  Aftermarket seats are

permitted; they must be fully upholstered.  All factory controls (lights, signals, horn, windows, wipers, etc.) must be retained and be operative.  The use of hand-

throttle controls is prohibited.

Kill Switch  --  All trucks must be equipped with a Kill Switch.

Mini Trucks  --  Mini trucks (S-10, Ranger, Dakota, etc.) are permitted to run V-8 engines – location to be the save as full-sized trucks.

Suspension  --  No suspension is required.  A solid suspension is permitted.  Lift Kits are acceptable.

Throttle  --  Either the normal foot throttle or an approved spring-loaded hand throttle will be permitted in this class.

Tires  --  All forms of pulling tires are permitted including Bar tires, Cepeks, cut tires, etc.  Tires may be no more than 36 inches tall.

Transmission: Automatic  --  Aftermarket transmissions are permitted.  Aftermarket torque converters, valve bodies and internal components are permitted. 

Transmission brakes are prohibited.  Any non-OEM floor-mounted automatic transmission shifter must be equipped with a spring-loaded positive reverse lockout

device to prevent the shifter from accidentally being put into reverse gear.  A functional neutral safety switch is mandatory.  All transmission lines must be metallic

or high-pressure type hose.  All vehicles with engines running 4500 RMP or more and using an automatic transmission must be equipped with a transmission shield

meeting SFI spec 4.1 and must be labeled accordingly.  A blanket-type shield, appropriately labeled as meeting SFI Spec 4.1 and extending from the rear of the block

to front of tail housing with a minimum 6 inch overlap where it is fastened, is permitted.  All non-blanket-type shields must incorporate two (or one, per

manufacturer’s instructions) ¾ inch by 1/8 inch straps that bolt to the shield on each side and pass under the transmission pan unless the transmission pan is

labeled as meeting SFI Spec 4.1.  All vehicles with engines running 4500 RMP or more and using an automatic transmission must be equipped with a flex plate

meeting SFI Spec 29.1 and be covered by a flex plate shield meeting SFI Spec 30.1.

Transmission: Manual  --  After market transmissions and transfer cases are permitted.  A clutch meeting minimum SFI Spec 1.1 or 1.2 is mandatory on all vehicles

that are collecting points.  All transmissions must be clutch assisted.  Sequential shifters are prohibited.

Wheelbase  --  The minimum allowed wheelbase is 90 inches; the maximum allowed is 180 inches.  The maximum wheelbase variation from left to right in 1 inch; the

measurement will be made using an X pattern (LF-RR and RF-LR).  The maximum tread width is 102 inches.  Extending rear wheels beyond the OEM position is

permitted.

E V E N T   O P E R A T I O N

DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT

PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK.

Show Room Gas Truck

The rules promulgated in these rules are intended as guidelines for the 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or

death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout

the season meet the requirements for this class.

The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may

be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the

inspecting area.

R E G U L A T I O N S

Maximum 6500 lbs. with driver.

26 inch hitch height.

3 bolt ons (example:  Carb Aluminum intake, exhaust)

No Blocks or Clamps

No Hanging weight or box.  All weight in truck bed and secured.

Bars allowed

No cut tires.

No stud tires.  No chains.

Hook point farthest point to back of truck.

Reese style hitch

Current license & inspection.

3.75 by 3.5 opening on devise and driver supplies own.

No race fuel or oxidizer.  Pump gas ONLY.

Exhaust throw muffler exit behind cab.

E V E N T   O P E R A T I O N

DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT

PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK.

Stock Diesel

The rules promulgated in these rules are intended as guidelines for the diesel 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against

injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment

throughout the season meet the requirements for this class.

This class is designed for daily-driven, on the road pickup trucks (full-bodied diesel pickup trucks).  Valid DOT registration and license plates are mandatory.  If your

truck is street legal and built to the rules set forth herein, you can enter this class.  Registration papers are required to prove that the truck is licensed for street use.  A

license plate with the current sticker tag is required to be affixed to the truck.  Where applicable, a current inspection sticker is required.  Trucks may be hauled to the

pull.  Trucks dominating the class will be move up.  Tech officials reserve the right to determine the legality of the truck.

The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may

be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the

inspecting area.

R E G U L A T I O N S

STOCK NO SITTING ON LINE BUILDING BOOST ROLL BOSSTING FIND.  FORDS NO LIMIT STRAPS IN FRONT END.

Weight  --  Maximum 8500 lbs. with driver.

Ballast  --  Ballast is permitted.  Hanging front weights are prohibited.  Ballast may be added in the bed of the truck.  If used, ballast must be securely fastened to the

BED ONLY.  Final decisions rest with the tech officials.  Adding weight in other areas of the truck will result in a DQ.

Batteries  --  The batteries must be securely mounted.  They may not be located in the driver compartment or forward of the radiator core support.

Body  --  The body and truck bed must be the OEM truck body, including the full bed floor and side skins both inner and outer.  The body must retain full OEM sheet

metal.  Metal aftermarket hoods are permitted.  Fiberglass is prohibited.  The hood must be closed and securely latched while the vehicle is hooked to the sled.  The

complete OEM firewall and OEM floor pan is mandatory.

Brakes  --  Four-wheel hydraulic brakes are mandatory.

Bumpers  --  Front bumpers must be Unaltered Factory stock.  No weighted front devices are permitted.   This includes but limited to:  Homemade bumpers, Brush

Guards, “Ranch Hand” type bumpers & winches.  Lower brackets (only) for snowplows frames are permitted so long as no modifications that would add weight are

present.  An unaltered decorative brush guard may be permitted at the option of the head tech officials.  Final decisions rest with the tech officials.  Trucks may NOT

compete without a bumper.

Chassis  --  The OEM chassis is mandatory.  The engine must be in the OEM location for the body is used.  The vehicle must retain the full OEM chassis.  Wheel tubs,

back-half conversions, tube chassis, etc., are prohibited.

Cooling System  --  Radiators must be in the stock location and be of at least stock size.

Credentials  --  All drivers must have a valid state driver’s license.

Driveline  --  An OEM transmission and transfer case is mandatory.  They must have been an option on a one-ton or smaller pickups.

Engine  --  The engine shall be stock appearing, OEM make- specific compression ignition engine.

Driver Restraint System  --   The OEM restraint system is mandatory and must be worn.

Exhaust  --  The exhaust must exit rearward of the driver’s compartment.  Stacks exiting through the hood or fender well are prohibited.

Fuel  --  The fuel must be pump #1/#2 diesel only.   Soy/Bio-diesel fuel is permitted.  Off-road diesel fuel is prohibited.

Nitrous Oxide  --  Is PROHIBITED along with other oxygen extenders and the use of PROPANE is also PROHIBITED.  All system components MUST be removed.

Fuel Injection Pump  --  The fuel injection pump is limited to a stock-appearing, OEM engine model-specific pump only.  The use of multiple high-pressure common-

rail pumps is prohibited.  Powerstroke engines with a single factory turbo may utilize a second HPOP.  Pumps from different years in the same engine model may be

interchanged.

Fuel System  --  The OEM fuel tank is mandatory and must be used.  Racing fuel cells are prohibited and must be removed from the vehicle.

Harmonic Balancer --  All engines turning 4500 RPM and higher must be equipped with a harmonic balancer or damper meeting SFI Spec 18.1.

Hitch  --  The hitch must be a receiver-style hitch; reinforcements are permitted.  Reinforcements must not extend forward of the centerline of the rear axle or to the

axle housing itself.  Trick hitches are prohibited.  The hooking point must be the rear-most point on the vehicle and must be rearward of the stock location of the

tailgate.  The hitch must be horizontal to the ground and stationary in all directions.  Bumpers may be notched or removed.  The hitch’s height from the ground may

not exceed 26 inches on 4wd units and 30 inches on 2wd units.  The hooking point must have a minimum 3.750-inch inside diameter opening for the sled hook.  The

hooking point will be measured to the center of the clevis loop.

Interior  --  A complete interior, including dashboard, door panels, headliner, etc., is mandatory.  Two matching front sears are mandatory.  Aftermarket seats are

permitted; they must be fully upholstered.  All factory controls (lights, signals, horn, windows, wipers, etc.) must be retained and be operative.  The use of hand-

throttle controls is prohibited.

Rear End  --  Non-OEM rear-end housings are prohibited.  It must have been an option on a one-ton or smaller pickup.  Rear axle bolts must be covered by a cap or

shield.

Steering  --  The vehicle must retain the full, original OEM steering gear.  The vehicle must retain the original OEM power steering assistance, if it was so equipped. 

Additional stabilizers are permitted.  Non-OEM power assist methods are prohibited.

Street Equipment  --  Complete headlight and taillight assemblies (all) are mandatory and must be operative.  Complete OEM windshield and windows are mandatory. 

Windows must be operative per factory specifications; that is, they must open and close via OEM electrical or mechanical means. 

Suspension: Front  --  The upper mounting point for strut assemblies must be in the factory location.  Adjustable caster/camber pillow ball mounts are permitted. 

The lower control arm may be strengthened provided factory-mounting points to chassis are maintained.  The lower mounting point for the strut assembly may be

modified for improved caster or camber.  Strut tower braces, lower tie bars, sway bars, and limit straps are permitted.

Suspension: Rear  --  An OEM-style suspension is mandatory.  Lowering or raising the vehicle height with suspension modifications is permitted.    All OEM

suspension mounting points must be retained and used.  Sway bars, limit straps, and camber kits are permitted.  The rear suspension must maintain a full

compression shock travel.  All rear suspensions must use at least one working shock absorber per wheel.  No Limiting blocks or lock out.

Tires  --  The tires must be DOT street tires.  Cut tires are prohibited.  Dual wheels are permitted only on trucks with a specific OEM bed designed for this application. 

Maximum tire width for dual wheels is 14 inch total.

Transmission: Automatic  --  Non-OEM transmissions are prohibited.  Aftermarket torque converters, valve bodies and internal components are permitted. 

Transmission brakes are prohibited.  Any non-OEM floor-mounted automatic transmission shifter must be equipped with a spring-loaded positive reverse lockout

device to prevent the shifter from accidentally being put into reverse gear.  A functional neutral safety switch is mandatory.  All transmission lines must be metallic

or high-pressure-type hose.  All vehicles with engines running 4500 RPM or more and using an automatic transmission must be equipped with a transmission shield

meeting SFI Spec 4.1 and must be labeled accordingly.  A blanket-type shield is permitted; it must be appropriately labeled as meeting SFI Spec 4.1 and it must

extend from the rear of the block to the front of tail housing with a minimum 6 inch overlap where it is fastened.  All non-blanket type shields must incorporate two

(or one, per manufacturer’s instructions) 3/4 inch by 1/8 inch straps that bolt to the shield on each side and pass under the transmission pan unless the

transmission pan is labeled as meeting SFI Spec 4.1.  All vehicles with engines running 4500 RPM or more and using an automatic transmission must be equipped

with a flex plate meeting SFI Spec 29.1 and be covered by a flex plate shield meeting SFI Spec 30.1.

Transmission: Manual  --  Non-OEM transmissions are prohibited.  Aftermarket internal components are permitted.  A clutch meeting minimum SFI Spec 1.1 or 1.2 is

mandatory on all vehicles with engines running 4500 RPM or more.  All manual transmissions must be clutch assisted.  Sequential shifters are prohibited.  All

vehicles with engines running 4500 RPM or more and equipped with a manual transmission must have a flywheel shield labeled as meeting minimum SFI Spec 6.3 or

greater.  Applications for  which an SFI Spec Flywheel shield is not available may use a properly attached SFI 4.1 or 4.2 blanket that completely covers the bell

housing; it must be attached to the block and extend rearward to the transmission with a minimum 6 inch overlap where it is fastened.

Transfer Case  --  Non-OEM transfer case are prohibited.  The transfer case must have been an option on a one-ton or smaller pickup truck.

Tuner  --  A single tuner (Edge, Bully Dog, etc.) is permitted.

Turbocharger  --  The turbocharger is limited to a stock-appearing, OEM/Factory make-specific charger only.  Turbochargers from different years in the same make

may be interchanged, no adapters to accept other model turbo.  6.4 liter Powerstroke engines may utilize the factory twin turbo configuration.  Any cut, notched or

etc. of the turbo wheels/blades will result in a disqualification.  Turbo housing must be unaltered OEM/Factory with no provision made for extra air flow and/or

machining to allow larger turbo wheel in the housing.  No busing of the inducer is permitted.  Aftermarket wheels in a stock unaltered housing are permitted.  Failure

to allow for turbo inspection will result in immediate disqualification.  Any truck disqualified for this reason will be required to undergo a compete super tech prior to

any further completion.  Absolutely no refunds for any illegal turbo found after the class has pulled.  NOTE:  IF YOU TRUCK CONSISTENELY RUNS IN THE TOP

THREE PLACES YOU WILL BE CHECKED.

Water Injection  --  Water injection is prohibited.  All system components must be removed from the truck.

Wheelbase  --  The vehicle must retain the original factory wheelbase and track width.

NOTE:  A TEEL-TALE TACHOMETER or A COMPUTER DATA LOG MAY BE REQUIRED ON THE TRUCK (AT THE OWNER’S EXPENSE) IN ORDER TO PROVE THAT THE

ENGINE IS RUNNING UNDER 4500 RPM AND THAT THE SAFETY EQUIPMENT IS NOT NECESSARY ON THAT TRUCK.

E V E N T   O P E R A T I O N

DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT

PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK.

2018 All Truck Pulling Classes Rules

The following specifications have been

prepared by Marion Center Speedway as

guidelines for the construction of a Pulling

Truck.  No warranty of safety is expressed or

implied as a result of this publication of rules. 

These are intended as a guideline and are in

no way a guarantee against injury or death to

participants, spectators, or officials. 

Anything not covered by these specifications

should be approved by the track officials and

placed in writing.  Continuous developments

in truck pulling and technology may mandate

changes in these rules.  However, it is our

intent to enforce and police these rules throughout the season.

We strive to keep the competition equal and fair for all competitors.  To accomplish this, IF IT

DOES NOT SAY YOU CAN – DON’T!!  Try to live within the spirit of the rules.  If you have any

questions, please contact track officials before you are found illegal for competition.

Anything not covered in these rules will be up to the discretion of the tech or track officials,

without recourse from drivers or owners.  Safety infractions can be cause for a truck to be kept out

of competition until they have been corrected.  The preceding rules are subject to revision and will

be judged accordingly.  UNLESS THE RULES SAY YOU CAN – DON’T!!!

Please be sure to look over our General Rules for more information about conduct and procedures at Marion Center Speedway. Check out our MCS Info. Tab above for Reserved Parking in Pits, Admission, Race Time, etc.
© MARION CENTER SPEEDWAY | MARION CENTER PA, 15759 Tel: 724-4274348
© MARION CENTER SPEEDWAY | MARION CENTER PA, 15759 Tel: 01234 0000000
MarionCenterSpeedway TheThrillOnTheHill
Racing Saturday Night at 7:30 Race Day Hotline (724)427-4348

2018 All Truck Pulling Classes Rules

The following

specifications have

been prepared by

Marion Center

Speedway as guidelines

for the construction of a Pulling Truck.  No

warranty of safety is expressed or implied as a

result of this publication of rules.  These are

intended as a guideline and are in no way a

guarantee against injury or death to

participants, spectators, or officials.  Anything

not covered by these specifications should be

approved by the track officials and placed in

writing.  Continuous developments in truck

pulling and technology may mandate changes

in these rules.  However, it is our intent to

enforce and police these rules throughout the

season.

We strive to keep the competition equal

and fair for all competitors.  To accomplish

this, IF IT DOES NOT SAY YOU CAN – DON’T!! 

Try to live within the spirit of the rules.  If you

have any questions, please contact track

officials before you are found illegal for

competition.

Anything not covered in these rules will

be up to the discretion of the tech or track

officials, without recourse from drivers or

owners.  Safety infractions can be cause for a

truck to be kept out of competition until they

have been corrected.  The preceding rules are

subject to revision and will be judged

accordingly.  UNLESS THE RULES SAY YOU

CAN – DON’T!!!

Please be sure to look over our General Rules for more information about conduct and procedures at Marion Center Speedway. Check out our MCS Info. Tab above for Reserved Parking in Pits, Admission, Race Time, etc.

Hot Street Diesel

The rules promulgated in these rules are

intended as guidelines for the diesel 4x4

trucking pulling sport.  Nothing herein should

be construed as a guarantee against injury or

death to participants, crewmen, family

members, bystanders or spectators.  Each

participant must assure that their equipment

and replacement equipment throughout the

season meet the requirements for this class.

The vehicle may be two or four-wheel drive. 

Pulling vehicles may be held for post

competition tech inspection.  Failure to abide

may result in a DQ.  Top five trucks may be

held at the end of track in a holding area for

post pull inspection.  It is the driver’s

responsibility to be aware of their placing and

be present with the truck in the inspecting

area.

R E G U L A T I O N S

Weight  --  Maximum 8500 lbs. with driver.

No duels on rear on non-dually

No hood stacks

No air to water intercooler

Hanging weight allowed

Solid rear suspension allowed but not

trussed/welded – has to be removable.

Fuel only

E V E N T   O P E R A T I O N

DRIVER’S WINDOW MUST BE ROLLED

COMPLETELY UP WHILE COMPETING. 

OTHER WINDOWS ON THE TRUCK MAY BE

LOWERED.  PASSENGERS ARE NOT

PERMITTED IN THE TRUCK AT ANY TIME

EITHER IN THE PITS OR ON THE TRACK.

Modified Street Legal Gas Truck

The rules promulgated in these rules are

intended as guidelines for the 4x4 trucking

pulling sport.  Nothing herein should be

construed as a guarantee against injury or

death to participants, crewmen, family

members, bystanders or spectators.  Each

participant must assure that their equipment

and replacement equipment throughout the

season meet the requirements for this class.

The vehicle may be two or four-wheel drive. 

Pulling vehicles may be held for post

competition tech inspection.  Failure to abide

may result in a DQ.  Top five trucks may be

held at the end of track in a holding area for

post pull inspection.  It is the driver’s

responsibility to be aware of their placing and

be present with the truck in the inspecting

area.

R E G U L A T I O N S

Maximum 6300 lbs. with driver.

26 inch hitch height.

Hanging weight allowed.  No more than 24

inches from farthest forward point

Bolt in blocks allowed only.

Must have 3 leaf springs, EOM

suspension.

Must have 1 inch downward movement at

all times.

Maximum 35 x 12.50 tires.

Open headers are allowed.

Race fuel allowed.  NO Q16 or Oxidizers.

Single carb.

All engine accessories belt driven.  No

electrical driven.

OEM wheel base

Drive line must match vehicle model

1 ton or less.  No duel wheels.

Battery in factory location.

Hook point farthest point to back of truck.

Style hitch

Current license & inspection.

No solid suspensions are permitted. 

Suspension must have a minimum of 1 inch of

downward movement at all times.  Driver must

be able to demonstrate FREE downward

movement with no use of mechanical

advantage.  No ratchet straps, binders or other

mechanical means.  No blocks are allowed

between axle housing and truck frame that

would restrict the necessary 1 inch of

movement.  If a truck has airbags, the system

must be disabled.  Traction bars are permitted

if they are only bolt on and completely

removable.  Traction bars must be pivotal.

E V E N T   O P E R A T I O N

DRIVER’S WINDOW MUST BE ROLLED

COMPLETELY UP WHILE COMPETING. 

OTHER WINDOWS ON THE TRUCK MAY BE

LOWERED.  PASSENGERS ARE NOT

PERMITTED IN THE TRUCK AT ANY TIME

EITHER IN THE PITS OR ON THE TRACK.

Open Street Gas Truck

The rules promulgated in these rules are

intended as guidelines for the 4x4 trucking

pulling sport.  Nothing herein should be

construed as a guarantee against injury or

death to participants, crewmen, family

members, bystanders or spectators.  Each

participant must assure that their equipment

and replacement equipment throughout the

season meet the requirements for this class.

The vehicle may be two or four-wheel drive. 

Pulling vehicles may be held for post

competition tech inspection.  Failure to abide

may result in a DQ.  Top five trucks may be

held at the end of track in a holding area for

post pull inspection.  It is the driver’s

responsibility to be aware of their placing and

be present with the truck in the inspecting

area.

R E G U L A T I O N S

Maximum 6300 lbs. with driver.

26 inch hitch height.  Hitch 27% of wheel

base.

 Hanging weight 60 inches from center

front axle.

Open on engine and add on parts (heads,

intake, single carb)

No cut tires.

No V-bars.

Maximum 35 x 12.50 tires.

Race fuel only.  No Alcohol.

Battery, fuel, pump, elet allowed on weight

box.

Kill switch when pulled must shut down

fuel pump and ignition.

Safety:  if not licensed and insured, must

have fire jacket and helmet.

Drive shaft loops required on trucks not

licensed for street.

Auto trans blanket on non-licensed trucks.

Must have Bloof proof bell housing.

E V E N T   O P E R A T I O N

DRIVER’S WINDOW MUST BE ROLLED

COMPLETELY UP WHILE COMPETING. 

OTHER WINDOWS ON THE TRUCK MAY BE

LOWERED.  PASSENGERS ARE NOT

PERMITTED IN THE TRUCK AT ANY TIME

EITHER IN THE PITS OR ON THE TRACK.

Outlaw 4wds

The rules promulgated in these rules are

intended as guidelines for the diesel 4x4

trucking pulling sport.  Nothing herein should

be construed as a guarantee against injury or

death to participants, crewmen, family

members, bystanders or spectators.  Each

participant must assure that their equipment

and replacement equipment throughout the

season meet the requirements for this class.

The vehicle may be two or four-wheel drive. 

Pulling vehicles may be held for post

competition tech inspection.  Failure to abide

may result in a DQ.  Top five trucks may be

held at the end of track in a holding area for

post pull inspection.  It is the driver’s

responsibility to be aware of their placing and

be present with the truck in the inspecting

area.

R E G U L A T I O N S

Weight  --  Maximum 8000 lbs. with driver.

Weights  --  Added weights are permitted. 

Hanging weights may not extend more

than 60 inches from the centerline of the

front axle.  Any loss of ballast while

hooked to the sled is cause for

disqualification.  No fuel or water may be

added to the truck after it has crossed the

scales.

Batteries  --  The batteries must be

securely mounted.  They may not be

located in the driver compartment.

Body & Frame  --  A tube frame is

permitted.  A fiberglass body with working

doors and complete firewall that seals the

driver compartment is acceptable.

Driveline  --  After market transmissions

and transfer cases are permitted.  Axle

shields are required and will be .060 inch

thickness in steel or aluminum.  Shield

shall not be mounted to axle ends or hub

bolts.  An access hole may be left open to

allow locking in the hubs.

Driveshaft Loops  --  All trucks must have

at least 6 inch wide u-joint shields around

the rear u-joints constructed of at least 1/4

inch steel or 3/8 inch aluminum that will

safely contain the u-joint and the ends of

each shaft.  In addition there will be at

least one shaft loop in the middle of the

drive shaft.  All shields must be securely

mounted to the vehicle.  Any front shaft u-

joint that is visible from the side of the

truck must be shielded to contain the u-

joint and the end of the shaft.

Engine: Gasoline or Alcohol  --  Engines

may utilize a single super charger or a

single turbo charger.  Screw type blowers

are not permitted.  Fuel injection is

permitted.  Aluminum blocks and

aluminum heads are permitted.  Bore

spacing may be altered.  All NTPA

necessary safety equipment and restraints

on the super charger must be followed.  A

single turbo charger is also permitted in

this configuration.  Super charged or turbo

charged engines are limited to 572 cubic

inches.  Hood stacks allowed.

Engine: Diesel  --  Engines are restricted to

6 cylinder and 8 cylinder compression

ignition engines.  Class maximum of 450

cubic inches will be enforced.  Diesel

engine must have been available in a one

tone or less truck from the factory.  Sigma

fuel pumps are permitted.  Water injection

is permitted.  The fuel must be pump #1/#2

diesel only.  Soy or Bio-diesel fuel is

permitted.  No Alcohol for fuel.  Diesel

engines may use an unlimited size single

(1) turbo charger.  A diesel engine running

without a muffler must have cross bolts

installed in their exhaust system.

 Hood stacks allowed

E X C E P T I O N:  Any diesel truck

running more than turbo chargers in any

configuration will hook with a 24 inch

drawbar at 7600 pounds.

All inline turbocharged engines must have

one cable totally surrounding the engine

block and head.

·The cable will be 3/8 inch diameter

·Cable must have minimum of two clamps

at all splices

·Cable will have 4 inches to 6 inches of

slack

Master Cutoff: Diesel Engine  --  A sled-

and driver- operated spring loaded

emergency air shut off is mandatory.  The

cable must terminate into a 2 inch

diameter steel ring.

Fuel Cutoff:  Diesel Engine  --  All trucks

must be equipped with a driver operated

fuel shutoff capable of blocking fuel flow

to the injections pump.  A three way dump

valve is required.

Floor  --  Each vehicle in competition must

be equipped with an OEM floor pan or a

minimum 0.024 inch steel floor pan or

lexan that extends the full length and

width of the driver seating area.  Non-OEM

floor pans must have cross members

(minimum 2 inch by 2 inch, 0.083 inch wall

thickness square tubing) installed

between the frame rails for proper seat

and driver restraint system installation

and support.  All openings must be sealed

with metal0excluding grommets.  The use

of fiberglass and/or magnesium is

prohibited.  The vehicle must be equipped

with one seat for the driver; it must be

properly installed.

Firewall  --  Each vehicle must be equipped

wit and EOM or minimum 0.024 inch steel

or lexan firewall, extending from side to

side of the body and from the top of the

engine compartments upper seal (hood,

cowl, or deck) in the bottom of the floor

and/or belly pan.  The firewall must

provide a bulkhead between the engine

and/or fuel tank and driver compartment. 

All openings must be sealed with metal-

excluding grommets.  The use of

magnesium is prohibited.

Flywheel Shield  --  All vehicles equipped

with a manual transmission must have a

flywheel shield labeled as meeting

minimum SFI Spec 6.3 or greater. 

Applications for which an SFI Spec

flywheel shield is not available may use a

properly attached SFI 4.1 or 4.2 blanket

that completely covers the bell housing

may be used in place of the shield; it must

be attached to the block and extend

rearward to the transmission with a

minimum 6 inch overlap where it is

fastened.

Safety  --  Fire suits are required at a

minimum of SFI 3.2.  In flip top bodied

vehicles without a firewall or working

doors, the driver will be required to wear

an SFI approved suit.  Driver must wear a

helmet meeting SNELL 85, 90, 95, 2000,

K98, or SFI Spec 31.1.  A fire extinguisher

system is permitted.  It must be securely

mounted.

Driver Restraint System  --   The OEM

restraint system is mandatory and must be

worn.  A five point safety harness is highly

recommended in the class.

Exhaust  --  The exhaust on a GASOLINE

or ALCOHOL vehicle may exit downward

at the back of the truck or directly out the

back of the truck or straight up through

the hood of the truck or straight up at the

back of the cab.  All DIESEL vehicles must

be equipped so as to direct exhaust

upward.  Exhaust through the hood is

permitted.  Tow 3/8 inch diameter bolts

must be placed in a cross pattern within 1

inch of each other as close to the final

turbo as is practical.

Other Fuel & Additives  --  Propane is

prohibited on any engine.  Other oxygen

extenders are prohibited such as

propylene oxide additives.  Racing fuel is

permitted but not oxygenated racing fuel

such as VP113 and Q16.  System

components used for these banned

substances must be fully removed from

the truck.  Fuel checks may be taken at

any time by the officials.

Nitrous Oxide  --  Nitrous Oxide is

permitted for use on any naturally

aspirated gasoline engine.  This may not

be used with alcohol or with any turbo

charged or super charged engine.

Hitch  --  The hitch must be constructed of

solid material that is properly attached and

braced.  The hooking point must be at

least 3.75 inches by 3.5 inches.  The length

of the hitch measured from the center of

the rear axle to the hitch point may be no

shorter than 27% of the actual wheelbase

of the truck.  The hitch must be horizontal

to the ground and stationary in all

directions.  The hooking point must have a

minimum 3.750 inch inside diameter

opening for the sled hook.  The hooking

point will be measured to the center of the

clevis loop.  The area where the hook

point is at must be free and clear of nay

obstructions.  No lever, pivot, axis or other

types of ‘trick’ hitches are prohibited.  No

vertical hitches, all hitches must be 33

degrees or less parallel to the ground  A

second hitch is not required in this class. 

Owners of trucks with a second hitch must

assure that the second hitch is ‘taped off’

– this is the owner’s responsibility.  The

hooking point will be measured to the rear

of the opening in the clevis/hook.

Interior  --  A complete interior, including

dashboard, door panels, headliner, etc., is

mandatory.  Two matching front sears are

mandatory.  Aftermarket seats are

permitted; they must be fully upholstered. 

All factory controls (lights, signals, horn,

windows, wipers, etc.) must be retained

and be operative.  The use of hand-throttle

controls is prohibited.

Kill Switch  --  All trucks must be equipped

with a Kill Switch.

Mini Trucks  --  Mini trucks (S-10, Ranger,

Dakota, etc.) are permitted to run V-8

engines – location to be the save as full-

sized trucks.

Suspension  --  No suspension is required. 

A solid suspension is permitted.  Lift Kits

are acceptable.

Throttle  --  Either the normal foot throttle

or an approved spring-loaded hand

throttle will be permitted in this class.

Tires  --  All forms of pulling tires are

permitted including Bar tires, Cepeks, cut

tires, etc.  Tires may be no more than 36

inches tall.

Transmission: Automatic  --  Aftermarket

transmissions are permitted.  Aftermarket

torque converters, valve bodies and

internal components are permitted. 

Transmission brakes are prohibited.  Any

non-OEM floor-mounted automatic

transmission shifter must be equipped

with a spring-loaded positive reverse

lockout device to prevent the shifter from

accidentally being put into reverse gear.  A

functional neutral safety switch is

mandatory.  All transmission lines must be

metallic or high-pressure type hose.  All

vehicles with engines running 4500 RMP

or more and using an automatic

transmission must be equipped with a

transmission shield meeting SFI spec 4.1

and must be labeled accordingly.  A

blanket-type shield, appropriately labeled

as meeting SFI Spec 4.1 and extending

from the rear of the block to front of tail

housing with a minimum 6 inch overlap

where it is fastened, is permitted.  All non-

blanket-type shields must incorporate two

(or one, per manufacturer’s instructions)

¾ inch by 1/8 inch straps that bolt to the

shield on each side and pass under the

transmission pan unless the transmission

pan is labeled as meeting SFI Spec 4.1.  All

vehicles with engines running 4500 RMP

or more and using an automatic

transmission must be equipped with a flex

plate meeting SFI Spec 29.1 and be

covered by a flex plate shield meeting SFI

Spec 30.1.

Transmission: Manual  --  After market

transmissions and transfer cases are

permitted.  A clutch meeting minimum SFI

Spec 1.1 or 1.2 is mandatory on all

vehicles that are collecting points.  All

transmissions must be clutch assisted. 

Sequential shifters are prohibited.

Wheelbase  --  The minimum allowed

wheelbase is 90 inches; the maximum

allowed is 180 inches.  The maximum

wheelbase variation from left to right in 1

inch; the measurement will be made using

an X pattern (LF-RR and RF-LR).  The

maximum tread width is 102 inches. 

Extending rear wheels beyond the OEM

position is permitted.

E V E N T   O P E R A T I O N

DRIVER’S WINDOW MUST BE ROLLED

COMPLETELY UP WHILE COMPETING. 

OTHER WINDOWS ON THE TRUCK MAY BE

LOWERED.  PASSENGERS ARE NOT

PERMITTED IN THE TRUCK AT ANY TIME

EITHER IN THE PITS OR ON THE TRACK.

Show Room Gas Truck

The rules promulgated in these rules are

intended as guidelines for the 4x4 trucking

pulling sport.  Nothing herein should be

construed as a guarantee against injury or

death to participants, crewmen, family

members, bystanders or spectators.  Each

participant must assure that their equipment

and replacement equipment throughout the

season meet the requirements for this class.

The vehicle may be two or four-wheel drive. 

Pulling vehicles may be held for post

competition tech inspection.  Failure to abide

may result in a DQ.  Top five trucks may be

held at the end of track in a holding area for

post pull inspection.  It is the driver’s

responsibility to be aware of their placing and

be present with the truck in the inspecting

area.

R E G U L A T I O N S

Maximum 6500 lbs. with driver.

26 inch hitch height.

3 bolt ons (example:  Carb Aluminum

intake, exhaust)

No Blocks or Clamps

No Hanging weight or box.  All weight in

truck bed and secured.

Bars allowed

No cut tires.

No stud tires.  No chains.

Hook point farthest point to back of truck.

Reese style hitch

Current license & inspection.

3.75 by 3.5 opening on devise and driver

supplies own.

No race fuel or oxidizer.  Pump gas ONLY.

Exhaust throw muffler exit behind cab.

E V E N T   O P E R A T I O N

DRIVER’S WINDOW MUST BE ROLLED

COMPLETELY UP WHILE COMPETING. 

OTHER WINDOWS ON THE TRUCK MAY BE

LOWERED.  PASSENGERS ARE NOT

PERMITTED IN THE TRUCK AT ANY TIME

EITHER IN THE PITS OR ON THE TRACK.

Stock Diesel

The rules promulgated in these rules are

intended as guidelines for the diesel 4x4

trucking pulling sport.  Nothing herein should

be construed as a guarantee against injury or

death to participants, crewmen, family

members, bystanders or spectators.  Each

participant must assure that their equipment

and replacement equipment throughout the

season meet the requirements for this class.

This class is designed for daily-driven, on the

road pickup trucks (full-bodied diesel pickup

trucks).  Valid DOT registration and license

plates are mandatory.  If your truck is street

legal and built to the rules set forth herein, you

can enter this class.  Registration papers are

required to prove that the truck is licensed for

street use.  A license plate with the current

sticker tag is required to be affixed to the

truck.  Where applicable, a current inspection

sticker is required.  Trucks may be hauled to

the pull.  Trucks dominating the class will be

move up.  Tech officials reserve the right to

determine the legality of the truck.

The vehicle may be two or four-wheel drive. 

Pulling vehicles may be held for post

competition tech inspection.  Failure to abide

may result in a DQ.  Top five trucks may be

held at the end of track in a holding area for

post pull inspection.  It is the driver’s

responsibility to be aware of their placing and

be present with the truck in the inspecting

area.

R E G U L A T I O N S

STOCK NO SITTING ON LINE BUILDING

BOOST ROLL BOSSTING FIND.  FORDS

NO LIMIT STRAPS IN FRONT END.

Weight  --  Maximum 8500 lbs. with driver.

Ballast  --  Ballast is permitted.  Hanging

front weights are prohibited.  Ballast may

be added in the bed of the truck.  If used,

ballast must be securely fastened to the

BED ONLY.  Final decisions rest with the

tech officials.  Adding weight in other

areas of the truck will result in a DQ.

Batteries  --  The batteries must be

securely mounted.  They may not be

located in the driver compartment or

forward of the radiator core support.

Body  --  The body and truck bed must be

the OEM truck body, including the full bed

floor and side skins both inner and outer. 

The body must retain full OEM sheet

metal.  Metal aftermarket hoods are

permitted.  Fiberglass is prohibited.  The

hood must be closed and securely latched

while the vehicle is hooked to the sled. 

The complete OEM firewall and OEM floor

pan is mandatory.

Brakes  --  Four-wheel hydraulic brakes

are mandatory.

Bumpers  --  Front bumpers must be

Unaltered Factory stock.  No weighted

front devices are permitted.   This includes

but limited to:  Homemade bumpers,

Brush Guards, “Ranch Hand” type

bumpers & winches.  Lower brackets

(only) for snowplows frames are permitted

so long as no modifications that would

add weight are present.  An unaltered

decorative brush guard may be permitted

at the option of the head tech officials. 

Final decisions rest with the tech officials. 

Trucks may NOT compete without a

bumper.

Chassis  --  The OEM chassis is

mandatory.  The engine must be in the

OEM location for the body is used.  The

vehicle must retain the full OEM chassis. 

Wheel tubs, back-half conversions, tube

chassis, etc., are prohibited.

Cooling System  --  Radiators must be in

the stock location and be of at least stock

size.

Credentials  --  All drivers must have a

valid state driver’s license.

Driveline  --  An OEM transmission and

transfer case is mandatory.  They must

have been an option on a one-ton or

smaller pickups.

Engine  --  The engine shall be stock

appearing, OEM make- specific

compression ignition engine.

Driver Restraint System  --   The OEM

restraint system is mandatory and must be

worn.

Exhaust  --  The exhaust must exit

rearward of the driver’s compartment. 

Stacks exiting through the hood or fender

well are prohibited.

Fuel  --  The fuel must be pump #1/#2

diesel only.   Soy/Bio-diesel fuel is

permitted.  Off-road diesel fuel is

prohibited.

Nitrous Oxide  --  Is PROHIBITED along

with other oxygen extenders and the use

of PROPANE is also PROHIBITED.  All

system components MUST be removed.

Fuel Injection Pump  --  The fuel injection

pump is limited to a stock-appearing, OEM

engine model-specific pump only.  The use

of multiple high-pressure common-rail

pumps is prohibited.  Powerstroke

engines with a single factory turbo may

utilize a second HPOP.  Pumps from

different years in the same engine model

may be interchanged.

Fuel System  --  The OEM fuel tank is

mandatory and must be used.  Racing fuel

cells are prohibited and must be removed

from the vehicle.

Harmonic Balancer --  All engines turning

4500 RPM and higher must be equipped

with a harmonic balancer or damper

meeting SFI Spec 18.1.

Hitch  --  The hitch must be a receiver-style

hitch; reinforcements are permitted. 

Reinforcements must not extend forward

of the centerline of the rear axle or to the

axle housing itself.  Trick hitches are

prohibited.  The hooking point must be the

rear-most point on the vehicle and must

be rearward of the stock location of the

tailgate.  The hitch must be horizontal to

the ground and stationary in all directions. 

Bumpers may be notched or removed. 

The hitch’s height from the ground may

not exceed 26 inches on 4wd units and 30

inches on 2wd units.  The hooking point

must have a minimum 3.750-inch inside

diameter opening for the sled hook.  The

hooking point will be measured to the

center of the clevis loop.

Interior  --  A complete interior, including

dashboard, door panels, headliner, etc., is

mandatory.  Two matching front sears are

mandatory.  Aftermarket seats are

permitted; they must be fully upholstered. 

All factory controls (lights, signals, horn,

windows, wipers, etc.) must be retained

and be operative.  The use of hand-throttle

controls is prohibited.

Rear End  --  Non-OEM rear-end housings

are prohibited.  It must have been an

option on a one-ton or smaller pickup. 

Rear axle bolts must be covered by a cap

or shield.

Steering  --  The vehicle must retain the

full, original OEM steering gear.  The

vehicle must retain the original OEM

power steering assistance, if it was so

equipped.  Additional stabilizers are

permitted.  Non-OEM power assist

methods are prohibited.

Street Equipment  --  Complete headlight

and taillight assemblies (all) are

mandatory and must be operative. 

Complete OEM windshield and windows

are mandatory.  Windows must be

operative per factory specifications; that

is, they must open and close via OEM

electrical or mechanical means. 

Suspension: Front  --  The upper mounting

point for strut assemblies must be in the

factory location.  Adjustable caster/camber

pillow ball mounts are permitted.  The

lower control arm may be strengthened

provided factory-mounting points to

chassis are maintained.  The lower

mounting point for the strut assembly may

be modified for improved caster or

camber.  Strut tower braces, lower tie bars,

sway bars, and limit straps are permitted.

Suspension: Rear  --  An OEM-style

suspension is mandatory.  Lowering or

raising the vehicle height with suspension

modifications is permitted.    All OEM

suspension mounting points must be

retained and used.  Sway bars, limit

straps, and camber kits are permitted.  The

rear suspension must maintain a full

compression shock travel.  All rear

suspensions must use at least one

working shock absorber per wheel.  No

Limiting blocks or lock out.

Tires  --  The tires must be DOT street

tires.  Cut tires are prohibited.  Dual

wheels are permitted only on trucks with a

specific OEM bed designed for this

application.  Maximum tire width for dual

wheels is 14 inch total.

Transmission: Automatic  --  Non-OEM

transmissions are prohibited.  Aftermarket

torque converters, valve bodies and

internal components are permitted. 

Transmission brakes are prohibited.  Any

non-OEM floor-mounted automatic

transmission shifter must be equipped

with a spring-loaded positive reverse

lockout device to prevent the shifter from

accidentally being put into reverse gear.  A

functional neutral safety switch is

mandatory.  All transmission lines must be

metallic or high-pressure-type hose.  All

vehicles with engines running 4500 RPM

or more and using an automatic

transmission must be equipped with a

transmission shield meeting SFI Spec 4.1

and must be labeled accordingly.  A

blanket-type shield is permitted; it must be

appropriately labeled as meeting SFI Spec

4.1 and it must extend from the rear of the

block to the front of tail housing with a

minimum 6 inch overlap where it is

fastened.  All non-blanket type shields

must incorporate two (or one, per

manufacturer’s instructions) 3/4 inch by

1/8 inch straps that bolt to the shield on

each side and pass under the

transmission pan unless the transmission

pan is labeled as meeting SFI Spec 4.1.  All

vehicles with engines running 4500 RPM

or more and using an automatic

transmission must be equipped with a flex

plate meeting SFI Spec 29.1 and be

covered by a flex plate shield meeting SFI

Spec 30.1.

Transmission: Manual  --  Non-OEM

transmissions are prohibited.  Aftermarket

internal components are permitted.  A

clutch meeting minimum SFI Spec 1.1 or

1.2 is mandatory on all vehicles with

engines running 4500 RPM or more.  All

manual transmissions must be clutch

assisted.  Sequential shifters are

prohibited.  All vehicles with engines

running 4500 RPM or more and equipped

with a manual transmission must have a

flywheel shield labeled as meeting

minimum SFI Spec 6.3 or greater. 

Applications for  which an SFI Spec

Flywheel shield is not available may use a

properly attached SFI 4.1 or 4.2 blanket

that completely covers the bell housing; it

must be attached to the block and extend

rearward to the transmission with a

minimum 6 inch overlap where it is

fastened.

Transfer Case  --  Non-OEM transfer case

are prohibited.  The transfer case must

have been an option on a one-ton or

smaller pickup truck.

Tuner  --  A single tuner (Edge, Bully Dog,

etc.) is permitted.

Turbocharger  --  The turbocharger is

limited to a stock-appearing, OEM/Factory

make-specific charger only. 

Turbochargers from different years in the

same make may be interchanged, no

adapters to accept other model turbo.  6.4

liter Powerstroke engines may utilize the

factory twin turbo configuration.  Any cut,

notched or etc. of the turbo wheels/blades

will result in a disqualification.  Turbo

housing must be unaltered OEM/Factory

with no provision made for extra air flow

and/or machining to allow larger turbo

wheel in the housing.  No busing of the

inducer is permitted.  Aftermarket wheels

in a stock unaltered housing are

permitted.  Failure to allow for turbo

inspection will result in immediate

disqualification.  Any truck disqualified for

this reason will be required to undergo a

compete super tech prior to any further

completion.  Absolutely no refunds for any

illegal turbo found after the class has

pulled.  NOTE:  IF YOU TRUCK

CONSISTENELY RUNS IN THE TOP THREE

PLACES YOU WILL BE CHECKED.

Water Injection  --  Water injection is

prohibited.  All system components must

be removed from the truck.

Wheelbase  --  The vehicle must retain the

original factory wheelbase and track

width.

NOTE:  A TEEL-TALE TACHOMETER or A

COMPUTER DATA LOG MAY BE

REQUIRED ON THE TRUCK (AT THE

OWNER’S EXPENSE) IN ORDER TO

PROVE THAT THE ENGINE IS RUNNING

UNDER 4500 RPM AND THAT THE SAFETY

EQUIPMENT IS NOT NECESSARY ON

THAT TRUCK.

E V E N T   O P E R A T I O N

DRIVER’S WINDOW MUST BE ROLLED

COMPLETELY UP WHILE COMPETING. 

OTHER WINDOWS ON THE TRUCK MAY BE

LOWERED.  PASSENGERS ARE NOT

PERMITTED IN THE TRUCK AT ANY TIME

EITHER IN THE PITS OR ON THE TRACK.

CONTACT MCS