Rules

PROCEDURES:

  1. All pullers must be registered at least one hour prior to the event starts.
  2. Pulling order will be determined by drawing a number at sign in. Some classes will receive their pulling order as they cross the scale.
  3. No competitor may compete in a class once the class has started if arriving late.
  4. Competitor must be at least 16 years old to participate.  If competitor is under age 18, he or she must have a written consent from parent or guardian.  Proof of age will be required.
  5. Only the driver is allowed in vehicle, no passengers.
  6. Someone must be in the driver’s seat at all times when the vehicle’s engine is running.
  7. Vehicle must be in neutral or park when it is being hooked to and unhooked from the sled.  Driver must also raise his or her hands while being hooked and unhooked.
  8. Driver’s meetings will be held approximately 30 minutes before the event is to start.  ALL drivers and pit crew members must attend.
  9. The first puller in each class who hooks to the sled is the test puller.  The test puller has the option of keeping their pull or dropping to any spot in the class.  This decision must be made before leaving the pulling track.
  10. If test puller breaks and the sled is reset, and if the puller is not able to pull, puller will receive last place points and money.
  11. If puller is unable to pull in drawn position due to mechanical reasons, they may drop to any spot in the class.  This decision is up to the track official.  Safety equipment does not qualify for a mechanical problem.
  12. Puller may spot the sled anywhere in bounds and behind the starting line they wish to do so.  This must be done when the sled is returning to the starting line from the previous pull.
  13. All pulls will start with a tight chain.  No jerking of the sled will be permitted.
  14. Puller has 3 (three) minutes to hook to the sled after track is ready or if after track official calls them to the track.
  15. Once puller is hooked to the sled, they will have 1 (one) minute to move the sled.
  16. Excessive loss of liquid will result in disqualification, if vehicle is under the green flag.  If vehicle is flagged, pull will be measured from flagman and track official’s judgment.
  17. Failure to stop for red flag will result in disqualification.  Leaving starting line under red flag will result in disqualification.
  18. Pull will be considered over when forward motion stops.  Puller must stop immediately when flagged or signaled.
  19. Any vehicle that goes out of bounds will be disqualified.
  20. Pullers will be given 2 (two) attempts to cross the 100 foot line.  An attempt is a pull of one inch or greater.  If a puller makes an attempt to stop before the 100 foot line, a re-pull will be granted at the track official’s discretion.
  21. All pulls will be measured to the nearest inch.
  22. Track official’s decisions are final and unappealable.
  23. All vehicles must pass tech inspection and meet all safety requirements before they will be allowed to compete.
  24. Vehicles may be teched at any time.
Pro Modified
 GENERAL SAFETY RULES:
  1. Full fire suits are required.  Full fire suit consists of full length pants and jacket; separate pieces or one piece suits are acceptable.  Leather or fireproof shoes are required.  Helmets are required.  No modifications to helmets are allowed.
  2. All pulling vehicles are required to have a minimum of a 2 ½ lb. fire extinguisher within reach of the driver.
  3. All vehicles are required to have a kill switch.  The kill switch will ground the ignition and the electric fuel pumps on spark ignition motors.
  4. No batteries are allowed inside the cab.
  5. All pulling vehicles must have a deadman throttle that will automatically return to a closed position.  Throttles will work in a forward to reverse motion, forward being open.
  6. Throttle required to have at least 2 (two) return springs.
  7. All pulling vehicles must have a starter interrupter switch that will allow starter engagement only in neutral or park position on the transmission gear selector.
  8. All vehicles using a foot throttle must have a toe strap.
  9. All vehicles using an automatic transmission must have a positive reverse gear lockout.
  10. Driver must be seated and in control of the vehicle any time motor is started or being started.
  11. The tech man or presiding official has the right to stop and disqualify any puller or pulling vehicle they feel is unsafe.
  12. Any puller found under the influence of intoxicating agents before or during competition will be disqualified.
  13. Seats belts are required on all vehicles.
  14. All pulling vehicles must have a neutral safety light.  A light, automotive quality, a minimum of 2 inches in diameter, must be mounted within 6 inches of hooking point.  A light in the driver’s compartment must be operated off the same system.  Both lights and the starter interrupter switch will be operated off of the shifter lever.
 GENERAL VEHICLE RULES:
  1. Planetary axles allowed.
  2. Axle shields are required.  May not be mounted to axle ends or hub bolts.  Center caps are permitted.  A hole may be cut to access the locking hubs.
  3. 133 inch wheelbase max.  Wheels must be centered in wheel wells.  Wheel wells may not be moved toward back of truck to center wheels.  Body must be lengthened or shortened between cab and rear wheel wells.  Body must appear to be stock i.e., no large gaps between bed and cab.
  4. Tube frames allowed.
  5. Fiberglass truck bodies allowed.
  6. Front weight bar must be between 55 and 60 inches from the centerline of the front axle.
  7. No mud flaps or dirt deflecting devices.
  8. Grille must be in original position.
  9. Must have a complete firewall.  Holes for operational devices are permitted.  Hole may have ¼ inch gap around device.
  10. No tanks, fuel lines, pressure gauges or fuel pumps allowed in cab.  All hydraulic lines in cab must be shielded top and side.
  11. Vehicle must have vertical bumpers to prevent climbing front of sled.  Bumpers to be 8 inches vertically and 24 inches maximum off the ground.
  12. Any and all pneumatic or hydraulic suspension systems cannot have hydraulic, air, or electric lines attached to these devices during competition.
  13. No automatic leveling devices.
  14. Bed must have some form of a cover, covering the top and tailgate area of the bed.
   KILL SWITCHES:
  1. All vehicles will be required to use kill switches.
  2. Kill switches will be securely mounted to the back of the vehicle and have a 2 inch diameter ring, at least 1/8 inch thick to attach to the sled.
  3. A tie wrap may be used during tech to show which vehicles have been teched.
 FUEL:
  1. No Fuel enhancing additives allowed.
 WEIGHT:
  1. No loose weight inside the vehicle will be permitted.
  2. Weights of ten lbs. or more lost while hooked to the sled and under the green flag will result in disqualification.  Any weight hitting the ground and still attached to the vehicle will also result in disqualification (internal breakage acceptable).  No rubber straps allowed to hold weights in place.
  3. Vehicle may not weigh more than the class maximum.
  4. Vehicle must weigh no less than 100 (one hundred) lbs. less than the class maximum.
 BRAKES:
  1. All pulling vehicles must have adequate stopping power from their braking system.
  2. All trucks will have complete working front or rear brakes.  Driveline brakes may be substituted for the above.
  3. All brakes in the driveline will be shielded 360 degrees with ¼ inch aluminum or steel.
 SEATS:
  1. All vehicles must have a strong rigid seat that is securely mounted.
  2. Tip seats will be securely fastened while pulling.
 EXHAUST:
  1. Exhaust must exit the vehicle vertically within ten degrees of plumb.
 ENGINE:
  1. Any naturally aspirated automotive type engine.  Two valves per cylinder.  Must accept a stock crank shaft.
  2. Any cubic inch is permitted.
  3. Engine must run on alcohol before during and after pull.  Priming with gasoline is permitted.
  4. All engines will have a solid deflection shield running the complete length of the block.  Shield must be securely fastened.  Starters, exhaust, fuel pumps, etc., need not be shielded.  Shields must cover from the base of the head to within one inch of the bottom of the pan.  The frame may be used as part of the shield.
  5. Any engine driven fan must be shielded 360 degrees.
  6. Rear of engine block can be no further forward than the centerline of the front axle.
  7. Any ignition type is allowed.
 CLUTCHES AND FLYWHEELS:
  1. All engines using a clutch flywheel assembly will run a full block saver plate.  Material to be 3/8 aluminum or 3/16 steel minimum.
  2. Minimum of 7 (seven) grade 5 or better bolts to hold the bell housing to block saver plate, with not less than two below the engine block.
  3. All clutch bell housings are to be 1/4 inch, one piece hydro form steel.  Bell housing must be certifiable.  If an explosion occurs, it must be re-certified.
  4. One cooling hole will be allowed in the bell housing, one inch diameter maximum.  Hole may not be in the explosion area of the bell housing.
  5. No welding will be allowed in the explosion area of the bell housing.
  6. No chemical milling will be permitted.
  7. All inspection maintenance holes must be approved.
  8. Crower stand adjustment slots will be accepted with proper covers.
  9. No cast iron clutch components or flywheels will be allowed.
  10. Clutches, flywheels and related components must be mounted to engine.
  11. There will be 5 (five) 3/8 inch bolts or 4 (four) ½ inch bolts to secure bell housing to the transmission.
  12. All clutch parts are subject to inspection at any time.
  AUTOMATIC TRANSMISSIONS:
  1. The use of torque converters, automatic shifts, etc., will be permitted.
  2. All vehicles using an automatic transmission must have an approved high performance flex plate.  No cast iron accepted.
  3. All automatic transmissions must have an approved full length safety blanket.
  4. All vehicles using an automatic transmission will use a positive reverse gear lockout.
 DRIVELINES:
  1. Trucks will have 3 (three) loops on rear drive shaft, and 2 (two) loops on front drive shaft, evenly spaced on driveline.  ¼ inch aluminum or steel material, 2 (two) inches away from shaft maximum.
  2. Loops must be round.
  3. U Joints must be shielded 360 degrees with ¼ inch aluminum or steel.  Shield must be at least 1 inch past the u joint assembly.
  4. Input or output shafts may not extend more than 4 (four) inches past a bearing.
  5. All intermediate shafts between the transmission and transfer case will be totally enclosed in ¼ inch aluminum or steel.
 HITCHES:
  1. No cam hitches or cam rear-ends allowed.  Hitch must be rigid in all directions.  Hitch length and height cannot change during the pull.  The hitch hold down mechanism on all hitches will be of sufficient strength equal to the bottom hitch supports.
  2. Safety hitch is required.  Safety hitch must be as strong as the main hitch and mounted 12 inches below main hitch.
  3. All hitch openings will be 3 (three) inches diameter round with no obstructions.
  4. Point of hook to centerline of rear axle shall be no less than 36% of vehicle wheelbase.
  5. If bed is too long it may be cut to accommodate 36% hitch.  Hitch must be unobstructed for hook up.
  6. Hitch height maximum is 26” before during and after the pull.
  7. Hitch must be rigid in all directions and solidly mounted to the vehicle.
  8. Pulling point can be no more than 1 ½ inches from back edge of hitching device.
  9. No clevis, chain or cable allowed in hitching device.
  10. Hitch to be steel and not less than ¾ of an inch thick and not more than 1 ¼ inches thick.
 TIRES:
  1. Maximum tire size to be 112 inch circumference when mounted on a 20 inch wide rim and inflated to 30 psi with original bar, not to exceed 18 inches in tread width before cutting.
  MISC:
  1. Any vehicle in violation of 3 (three) or more rules will not be allowed to hook to sled.  Hired exhibition vehicles are exempt.
  2. Failure to follow rules set forth will result in disqualification.
  3. Must follow all directions given by scale judge.  If judge is not happy with placement of vehicle on scale, it will be required to be removed and repositioned.
  4. A competitor will have 2 (two) sanctioned events from when vehicle is first teched, attended by competitor or not, to make necessary changes to vehicle to be in compliance with the rules.

SUPER STOCK 4×4 CLASS
Non Open Class

4500, 5500, & 6000 lbs.

ALL THE SAME RULES AS STREET MODIFIED WITH THE FOLLOWING ALLOWANCES:

1. Engine size maximum 550ci (6000lb) 472CI (4500 & 5500lb)

2. Carburetors for 4500 & 5500lb must have 4150 base plate

3. No Aluminum Blocks

4. Engines may not exceed 50% of their block length forward of the centerline of the front axle.  Accessories may not exceed into the core support, i.e.  (water pump, alternator etc).

5. Must be OEM configuration Heads for make of motor used

6. May hang weights (not to exceed 42”) forward from the center point of the front axle.

7. 36” tires maximum. May have Terra tires with factory DOT marking.

8. May block rear suspension.

9. Can cut out floor of bed if desired.

10. Lights, blinkers, etc. must be in factory location. Mirrors suggested.

11. Must have kill switch located immediately adjacent to the hitch. Must be in a ring form with an approximate thickness of  ¼ inch and a circumference of at least 1 inch. Electric fuel pump must be wired to kill switch.

12. Maximum wheel base length not to exceed 133 inches (max) No wheel base modifications.

13. Stock frame may be reinforced no boxing or sub frames. (I.E. frame inside frame) [ [

14. No air bags or air shocks on front axle.

15. Drive-line loops required. Must cover front and rear of each driveline.

16. Weights must clear scale.

17. Must have a minimum of both front brakes and/or front or rear pinion brake.

18. Manual Transmissions must have Scatter Shield with Steel flywheel and high performance clutch (dual disc. Max. & Must have pedal). SFI blanket for all automatics.

19. SFI approved harmonic balancer required.

20. Minimum of 2-½ lb. Fire extinguisher must be within reach of driver.

21. Helmets Required

 

Diesel Modified
Modified Diesel Category RulesThe Modified Diesel (MD) class is designed for off-road, full-bodied, severely modified pickup trucks built for pulling.

Weight breaks:
8000 lbs. Weight is with driver.

REGULATIONS

Ballast:

Ballast is permitted. Hanging weights may not extend more than 60 inches from the centerline of the front axle. Weights in the bed are to be mounted securely. No weights in the driver compartment.

Batteries:
Batteries must be securely mounted. They may not be located in the driver compartment.

Body:
Any truck body style is permitted, but the body must retain the full-bodied appearance. The vehicle must have at least two functional doors. The doors must open and close from inside and outside. Glass may be replaced with Lexan or other shatterproof material of 1/8 inch minimum thickness. The side windows need not be operational.

Brakes:
Vehicles must have adequate stopping power.

Cooling System:
Any sealed system is permitted.

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

Driver Restraint System:
A three-inch-wide driver restraint system labeled as meeting SFI Spec 16.1 is recommended and should be worn snugly.

Driveshaft Loops: Front & Rear
All trucks must have at least six inch long u-joint shields around the rear u-joint 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:
The engine must be compression ignition engine with a maximum of 460 cu in. The engine block must have been available as a factory option on one-ton or smaller pickup truck. An SFI rated dampener is recommended.

Engine Shielding:
A ¼” steel plate or 3/8” aluminum plate shield across the frame under the front of the motor shielding the damper and engine fan area is required. .  Side shields are recommended to run the length of the block covering the block from head to pan.  The frame rails may be used as part of this shield.

Exhaust:
Exhaust must be directed away from the fuel tank and driver and exit the vehicle within 10 degrees of plumb. Two 3/8 inch diameter bolts must be placed through the exhaust pipe in a cross pattern within one inch of each other as close to the final turbo as is practical.

Fire Extinguisher:
A Halon fire extinguisher is required. It must be securely mounted and within reach of the driver.

Firewall:
Each vehicle must be equipped with a minimum 0.024 inch steel firewall, extending from side to side of the body and from the top of the engine compartment’s upper seal (hood, cowl, or deck) to 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, excluding grommets. The use of magnesium is prohibited

Floor:
Each vehicle in competition must be equipped with an OEM or minimum 0.024 inch steel floor pan that extends the full length and width of the driver compartment.

Fuel:
The fuel must be pump #1 or #2 diesel only. Soy/Bio-diesel fuel is permitted.

Fuel Shutoff:
All trucks must be equipped with a driver-operated fuel shutoff capable of blocking fuel flow to the injection pump. A three way dump valve is recommended.

Fuel System:
Location: All fuel tanks, lines, pumps, valves, etc. must be located outside of the driver compartment and within the confines of the frame and/or steel body. Fuel pressure gauge isolators, with steel-braided line, may be mounted on the firewall.

Lines:
All non-OEM fuel lines (including gauge and/or data-recorder lines) must be metallic, steel-braided or “woven or woven-push lock.” Fuel lines (except steel-braided lines) in the flywheel/bell housing area must be enclosed in a 16 inch length of steel tubing of 1/8 inch minimum wall thickness and be securely mounted as a protection against fuel-line rupture.

Helmet:
Drivers must wear a helmet meeting Snell 90, 95, 2000, K98 or SFI Spec 31.1 or 41.1 standards. The retention strap must be securely and snugly fastened. The helmet must have the appropriate certification sticker affixed inside it.

Hitch:
The hitch must be constructed of solid material that is properly attached and braced. The hooking point must be at least 44 inches rearward from the centerline of the rear axle. The hitch must be horizontal to the ground and stationary in all directions. The hitch’s height from the ground may not exceed 26 inches. The hooking point must have a minimum 3.00 inch inside diameter opening for the sled hook. The hooking point will be measured to the center of the clevis loop. The final decision rests with the MM Technical Department.

Interior:
The vehicle must be equipped with one seat for the driver; it must be securely installed.

Intermediate Shafts:
All intermediate drive shafts must be fully enclosed with a 5/16 inch steel or 3/8 inch aluminum shield. The shield must cover the entire length of the shaft and the universal joints and yokes at each end.

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

Nitrous Oxide:
NITROUS OXIDE IS PROHIBITTED.  All tanks must be removed from the vehicle.

Propane:
PROPANE IS PROHIBITTED.  All tanks must be removed from the vehicle.

Protective Clothing:
Drivers must wear a jacket and pants or one piece suit meeting SFI specification 3.2A/5 or 3.2A/15, gloves meeting SFI specification 3.3/15, and shoes or boots meeting SFI specification 3.3/5. Protective clothing exceeding these specifications is permitted. The protective clothing must be labeled with the proper SFI specification.

Rear Axle:
Rear axle bolts must be covered by a cap or shield.

Suspension:
Rigid or 4-link suspensions are permitted.

Tires:
Tires may be no more than 36 inches tall.  Pulling tires okay.

Tow Vehicles:
Tow vehicles are permitted.

Transmission, Automatic:
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 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 six 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
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. If SFI rated flex plates aren’t available then a blanket shield is permissible per above specifications.

Transmission, Manual:
A clutch meeting SFI Spec 1.2 or 1.3 is mandatory. All transmissions must be clutch assisted. Sequential shifters are prohibited. 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; it must be attached to the block and extend rearward to the transmission with a minimum six inch overlap where it is fastened. If a SFI rated clutch isn’t available then a flywheel shield and blanket may be used per above specifications.

Turbocharger, Supercharger:
Turbocharger(s) must be enclosed in the engine compartment; they may not be visible from outside the truck.

Water Injection:
Water injection is permitted. Alcohol, methanol, and all other flammables are accepted. Commercially available pump lube allowed.

Wheelbase:
The minimum allowed wheelbase is 90 inches; the maximum allowed is 158 inches. The maximum wheelbase variation from left to right is one inch; the measurement will be made using a X pattern (LF-RR and RF-LR). The maximum allowed tread width is 102 inches.

*All judgments will be made by MLM officials and will be final.

Diesel Super Street
Super Street Diesel Category RulesThe Super Street (SS) class is designed for full-bodied trucks. The vehicle must be four wheel drive.Weight breaks:
8000 lbs. Weight is with driver.

REGULATIONS

Ballast:
Ballast is permitted. Hanging weights may not extend more than 60 inches from the centerline of the front axle. Weights in bed must be mounted securely. No weights in driver compartment.

Batteries:
Batteries must be securely mounted. They may not be located in the driver compartment.

Body:
The body may be any 3/4- or 1-ton full-size pickup truck body. The bed floor must remain intact. The body must retain full sheet metal.  Metal after-market hoods are permitted.  Factory constructed flat beds will be allowed per the tech official’s judgment.

Brakes:
Four-wheel hydraulic brakes are mandatory.

Chassis:
Tube chassis are prohibited.

Cooling System:
Radiators must be securely mounted in the vehicle.  The radiator need not be in the original mounting location.

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

Driveline:
Racing or aftermarket transmissions, transfer cases and front and rear ends are permitted. All trucks must have at least six inch wide u-joint shields around the rear u-joint constructed of at least 1/4 inch steel or 3/8 inch aluminum that will safely contain the u-joint and the end of the rear 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.

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

Engine:
The engine is restricted to 6 cylinder and 8 cylinder compression ignition engines.  All vehicles must have an OEM engine.  The engine block must have been available as a factory option on one-ton or smaller pickup trucks.

Exhaust:
All vehicles must be equipped to direct exhaust upward. Two 3/8 inch diameter bolts must be placed in the exhaust pipe in a cross pattern within one inch of each other as close to the final turbo as is practical.
Fire Extinguisher:
A fire extinguisher is strongly recommended. It must be securely mounted within reach of the driver.

Floor:
The complete OEM floor pan is mandatory.

Fuel:
The fuel must be pump #1 or #2 diesel only. Soy/Biodiesel fuel is permitted.

Helmet:
Drivers must wear a helmet meeting Snell 90, 95, 2000, K98 or SFI Spec 31.1 or 41.1 standards. The retention strap must be securely and snugly fastened the helmet must have the appropriate certification sticker affixed inside it.

Hitch:
The hooking point must be the rear-most point of the vehicle. Alternatively, the hitch must be constructed of solid material that is properly attached and braced; the hooking point must be at least 44 inches rearward from the centerline of the rear axle. The hitch must be horizontal to the ground and stationary in all directions. The hitch’s height from the ground may not exceed 26 inches. Bumpers may be notched or removed. The hooking point must have a minimum 3.00 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 seats 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 vehicle must be equipped with two front seats that are securely mounted.

Master Cutoff:
A sled- and driver-operated spring-loaded emergency air shut off is recommended. The cable must terminate into a two inch diameter steel ring.

Nitrous Oxide:
Nitrous oxide is prohibited. All other oxygen extenders are prohibited. All bottles and tanks MUST be removed from the truck and all lines must be capped at the solenoid(s).

Propane:
Propane is prohibited. All bottles and tanks MUST be removed from the truck and all lines must be capped at the solenoid(s).

Rear End:
Rear axle bolts must be covered by a cap or shield.

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. Traction bars and devices are permitted. The final decision rests with the MM Technical Department.

Suspension, Rear:
Air suspension is permitted, but the compressor must be disconnected.

Tires:
Tires must be DOT street tires only. Cut tires are prohibited. Turbocharger:
Twin turbochargers and unlimited single turbochargers are allowed.

Water Injection:
Water injection is allowed. Alcohol, methanol, and all other flammables are prohibited. Commercially available pump lube is allowed.

Wheelbase:
The vehicle must retain the original factory wheelbase and track width for the body used.

*All judgment calls will be made by MLM officials and will be final.

Diesel StreetWeight breaks
8000 lbs. Weight is with driver.REGULATIONSBallast:
Hanging weight may not extend past 60 inches from the centerline of the front axel. Weights must be securely attached to the vehicle.

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

Body:
The body must be the OEM truck body, including the full bed floor. The body must retain full sheet metal. After-market hoods are permitted.

Brakes:
Four-wheel hydraulic brakes are mandatory.

Chassis:
The OEM chassis is mandatory. The engine must be in the OEM location for the body 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 as manufactured is mandatory.

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

Engine:
The engine is limited to a stock-appearing, OEM make-specific compression ignition engine.
Exhaust:
The exhaust must exit rearward of the driver’s compartment. Stacks exiting through the hood or fenderwell are prohibited.

Fire Extinguisher System:
A fire extinguisher system is recommended. It must be securely mounted.

Firewall:
The complete OEM firewall is mandatory.

Floor:
The complete OEM floor pan is mandatory.

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

Fuel Injection Pump:
The fuel injection pump is limited to a stock-appearing, OEM engine model-specific pump only.

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

Hitch:
The hitch must be a receiver style hitch attached to the frame; reinforcements are permitted. 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. The hooking point must have a minimum 3.00 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, etc., is 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.

Nitrous Oxide:
Nitrous oxide is prohibited. No other oxygen extenders are allowed. All system components must be removed from the truck or bottles removed and lines capped after the solenoids.

Propane:
Propane is prohibited. All system components must be removed from the truck or bottles removed and lines capped after the solenoids.

Rear End:
The rear end must be the model supplied with the vehicle as manufactured.

Steering:
The vehicle must retain the full, original OEM steering gear.

Street Equipment:
Complete headlight, taillight, and back up light 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. Traction bars and devices are permitted. Final  decisions rest with the Technical Department.

Suspension, Rear:
An OEM-style suspension is mandatory. Suspension must retain at least 1 inch of travel. Traction bars and devices are permitted; they must be bolt-on only; welds are permitted for attachment to frame or axle housing. Control arms may be strengthened or replaced, provided all original mounting points are retained. Strut tower braces, lower tie bars, sway bars, limit straps, and camber kits are permitted. All rear suspensions must use at least one working shock absorber per wheel.

Tires:
The tires must beDOT street tires. Cut tires are prohibited.

Tow Vehicles:
Tow vehicles are prohibited.

Transfer Case:
Non-OEM transfer cases are prohibited. The transfer case must be the model supplied with the vehicle as manufactured.

Transmission, Automatic:
Non-OEM transmissions are prohibited.  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.

Transmission, Manual:
Non-OEM transmissions are prohibited.  All transmissions must be clutch-assisted.

Turbocharger:
The turbocharger is limited to one single turbo charger with an inducer bore of 2.8 inches or less.

Water Injection:
Water injection is prohibited.  Alcohol, methanol and all other flammables prohibited.  All system components must be removed from the truck or tank removed or emptied and lines capped.

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

*All judgment calls will be made by MLM officials and will be final.

Stock DieselWeight breaks

8000 lbs. Weight is with driver.

 

REGULATIONS

 

Ballast:

No added weight will be allowed. 

 

Batteries:

The batteries must be securely mounted in the stock location. They may not be located in the driver compartment.

 

Body:

The body must be the OEM truck body, including the full bed floor. The body must retain full sheet metal. After-market hoods are permitted.

 

Brakes:

Four-wheel hydraulic brakes are mandatory.

 

Chassis:

The OEM chassis is mandatory. The engine must be in the OEM location for the body 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 as manufactured is mandatory.

 

Driver Restraint System:

The OEM restraint system is mandatory and must be worn.

 

Engine:

The engine is limited to a stock-appearing, OEM make-specific compression ignition engine.
 

Exhaust:

The exhaust must exit rearward of the driver’s compartment. Stacks exiting through the hood or fenderwell are prohibited.

 

Fire Extinguisher System:

A fire extinguisher system is recommended. It must be securely mounted.

 

Firewall:

The complete OEM firewall is mandatory.

 

Floor:

The complete OEM floor pan is mandatory.

 

Fuel:

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

 

Fuel Injection Pump:

The fuel injection pump is limited to one stock-appearing, OEM engine model-specific pump only.

 

 

Fuel System:

The OEM fuel system is mandatory and must be used. Racing fuel cells are prohibited and must be removed from the vehicle.

 

Hitch:

The hitch must be a receiver style hitch attached to the frame; reinforcements are permitted. 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. The hooking point must have a minimum 3.00 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, etc., is 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.

 

Nitrous Oxide:

Nitrous oxide is prohibited. No other oxygen extenders are allowed. All system components must be removed from the truck.

 

Propane:

Propane is prohibited. All system components must be removed from the truck.

 

Rear End:

Rear axle bolts must be covered by a cap or shield. The rear end must be the model supplied with the vehicle as manufactured.

 

Steering:

The vehicle must retain the full, original OEM steering gear.

 

Street Equipment:

Complete headlight, taillight, and back up light 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. Traction bars and devices are permitted. Final  decisions rest with the MLM Technical Department.

 

Suspension, Rear:

An OEM-style suspension is mandatory. Lowering or raising the vehicle height with suspension modifications is permitted. Traction bars and devices are permitted; they must be bolt-on only; welds are permitted for attachment to frame or axle housing. Control arms may be strengthened or replaced, provided all original mounting points are retained. Strut tower braces, lower tie bars, sway bars, limit straps, and camber kits are permitted. The rear suspension must maintain a stock shock travel. Suspension stops are not allowed. All rear suspensions must use at least one working shock absorber per wheel.

 

Tires:

The tires must be DOT street tires. Cut tires are prohibited.

 

Tow Vehicles:

Tow vehicles are prohibited.

 

Transfer Case:

Non-OEM transfer cases are prohibited. The transfer case must be the model supplied with the vehicle as manufactured. 

 

 

Transmission, Automatic:

Non-OEM transmissions are prohibited.  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.

 

Transmission, Manual:

Non-OEM transmissions are prohibited.  All transmissions must be clutch-assisted.

 

Turbocharger:

The turbocharger is limited to stock, OEM make-specific charger only.

 

Water Injection:

Water injection is prohibited.  Alcohol, methanol and all other flammables prohibited.  All system components must be removed from the truck.

 

Wheelbase:

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

  

 

Stock 4X4 Class ~4500lb, 5500lb & 6500lb

 

  • Must have stock front bumper or after market replacement.
  • Must be street legal headlights, blinkers on and working, mirrors, etc…
  • Original hoods in place, no hood scoops.
  • No engine modifications, except dress-up kits and air cleaners.  Batteries must have tie downs.
  • Exhaust modifications allowed.  (Headers or intake manifold, but NOT both)
  • No nitrous oxide, methane or alcohol fuels.
  • Rim and tire modifications from stock allowed.  Must be DOT tires, no Terra tires or sharpening of tires.
  • No hanging of weights.
  • Sled end of hitch must be no higher than 26”, stationary in all directions (no chains) and no closer than 36% of the wheel base to the center line of the rear axle.  (MUST BE HORIZONTAL)
  • Suspension must have at least 2” of free travel (may be tested at the scale).  No traction bars unless stock.  No axles larger than Dana 60 series unless stock.
  • Steering and seating must be close to stock.  Seat belts must be used and will be checked without fail.
  • Fuel tanks must be bolted down.
  • Beds must have floor intact.  Nothing is allowed in the bed without being bolted down.
  • Manual or automatic transmissions only.  No racing transmissions, Lenco, etc…
  • No quick change transfer cases (Pro Fab, chain drive, homemade, etc…)

 

 

Street 4X4 Class ~ 4500lb, 5500lb & 6500lb

 

  • Same rules as stock class with the following allowances.
  • Engine modifications okay.  Single carb, naturally aspirated, no tunnel rams or superchargers.
  • Open headers allowed.  Must exit under the vehicle toward the rear of the vehicle.
  • The midline of the outer most tire must not exceed the outside of the inner most tire. 
  • May have bolted traction bars.
  • No axles larger than Dana 70 series (no military, rockwell, etc…)
  • Weights allowed if securely fastened in the bed.

 

 

Super Stock 4X4 Class ~ 6000lb

 

  • Same rules as street class with the following allowances.
  • May hang weights.  Not to exceed 42” forward from the center line of the front axle.
  • 36” tire maximum.  May have Terra tires with factory DOT marking.
  • May block rear suspension.
  • May cut out floor of bed if desired.
  • Lights, blinkers, etc. must be in factory location, mirrors suggested.
  • Must have a kill switch located immediately adjacent to the hitch.  Must be a ring of approximately ¼” thickness and a diameter of at least two inches.
  • Maximum wheel base length not to exceed 133 inches.  No wheel base modifications allowed.

 

 

Note: Not all weight classes are open at every event.

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