www.iracemud.com  www.iracemud.com  www.iracemud.com  www.iracemud.com  www.iracemud.com  www.iracemud.com

We have heard your comments, requests, and suggestions. The AMRA Board has consulted with many technical officials, engine builders, racers, other racing associations, and other knowledgeable people to make these rules as accurate & consistent to the best of our ability. We will continue a whole-hearted effort to keep this sport that we all love growing for the future.

Please enjoy the season and Let’s ALL Have Some! This is why we started this association and, hopefully, that’s why you have joined to race with us in The American Mud Racing Association. Because YOU Are the Association We Call the AMRA.

AMRA Class Rules                                                                                       

YOU ARE EXPECTED TO KNOW THE RULES.

IGNORANCE OF THE RULES IS NOT AN EXCUSE!

The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish minimum acceptable requirements for such events. These rules shall govern the condition of all events, and by participating in these events, all participants are deemed to have complied with these rules. 

NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATIONS OF, OR COMPLIANCE WITH, THESE RULES AND/OR REGULATIONS. They are intended as a guide for conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator, or official.

The AMRA and Track Officials shall be empowered to permit reasonable and appropriate deviation from any of the specifications herein or impose any further restrictions that in their opinion do not alter the minimum acceptable requirements. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH ALTERATION OF SPECIFICATIONS. Any interpretation or deviation of these rules is left to the discretion of the officials. Their decision is final.

The rules set forth shall be effective for AMRA 2008 racing season. The AMRA reserves the right to amend, alter, suspend, delete, or supplement these rules as conditions warrant and without any prior notice. Any changes will be posted on www.IRACEMUD.com. It is your responsibility to be aware of changes posted. These rules shall govern the condition of all AMRA events.

Mud Racing is a competitive sport, and, like any other sporting event, it depends on fan support. There is also a great deal of showmanship and public relations required. Starting on time, running events in a professional manner, proper uniforms or attire, race trucks brightly painted and the conduct of the competitors both on and off the track must be established.

AMRA sanctioned events are held on private property. Any person on this property without the permission of the track owners or AMRA is guilty of trespassing and subject to the penalties prescribed by law. Through your truck registration, you have been given the authority and the right to be on this property in conjunction with your mud racing activity only. However, the track owners of the race track and the AMRA reserves the right to revoke and cancel this authority at any time it is felt that your presence or conduct is not in the best interest of mud racing, your fellow competitors, the fans, management, or officials of the AMRA.

Although every effort has been directed toward complete, understandable, and correct rules, as well as the same factors in putting them into print, the AMRA cannot possibly anticipate every situation, circumstance, or interpretation.

The definition of ‘OEM/Stock’ means ‘No Modifications to Factory Parts or Factory Specifications’.

STOCK CLASS

Safety Rules:

1.          Safety is the First Priority. If You Do Not Pass the Safety Tech-In, You DO NOT RACE.
ALL SAFETY RULES Apply - See Safety Rules.

Roll Cage:

1.          Must have a 4-Point Roll Cage in the Cab Welded to Frame. Side Bar Must be Included on Driver and Passenger Side and Must Pass the Driver or Rider at a Point Midway Between the Shoulder and the Elbow.  A 6-Point Roll Cage Is Recommended.

2.          Must Be a Minimum of 1.5” Diameter.  With a Minimum Wall Thickness of .083 Chrome Molly or .120 Mild Steel Tubing.

3.          NOTE: Roll Bars/Sport Bars in the Bed of the Vehicle Are Not Considered an Acceptable Substitute for a Roll Cage.

4.          Roll Cage Must Have Minimum Four (4) Half-Inch (0.5 Inch) Round Tubing or Front Windshield Bars May Be Square Tubing.  Windshield Bars Must Span From the Top Roll Cage Bar to the Lower Roll Cage Bar or Firewall.  Must be Welded Top and Bottom.  Welded Attachments Only- No Other Welding Attachments Allowed (No Bolt-In Types, No Straps, and No Rebar Allowed). 

5.          Doors May Be Trimmed for Roll Cage, But Not Gutted. "Gutted" Refers to Excessive Removal of the Interior Above and Beyond That Which Is Required for the Roll Cage And/Or Other Specific Rules Allow.  (May Be Gutted If Door Bars Are Built to Protrude Against Outer Door Skin.)  (Nascar or Dirt Track Type Construction) (Minimum of Two)

6.          Doors Must Be Able to Securely Open & Close. 

Body and Frame:

1.          Original Body and Frame with No Modifications Other than Fender Cut-Outs. (Fender Cut-Outs Cannot Exceed More Than 24 Inches From Top of Bed Rail Down With a One (1) Inch Tolerance or Eight (8) Inches Up From the Bottom of Door Rocker Panel With a One (1) Inch Tolerance.)

2.          Vehicles Must Have All Factory Sheet Metal, Except Tailgates.

3.          NOTE: Excessive Body and Interior Modifications Moves Race Truck Up To Super Modified Class.

4.          No Mixing of Engine and Body Style. Engine Type Must Be Offered By Manufacturer. (Ex. Ford Engine in Ford Chassis, Chevrolet Engine in Chevrolet Chassis, etc.)

5.         All Big Block and Small Block Engines Over a 373 Cubic Inch Must Be in a ¾ or 1 Ton Long Wheel Base Vehicle with 8 Lug ¾ or 1 Ton Running Gear (Must be a Heavy ¾ Ton Frame and Running Gear, Drivetrain, Axles, Springs, etc.)

6.          Vehicles in the ½ Ton Category May Run ¾ or 1 Ton Running Gear, BUT This Does Not Qualify the Vehicle to Run Over a 373 Cubic Inch Limit Engine.

7.          No Shortening or Lengthening of Frame Allowed.

8.          If Fuel Cell and Batteries are Located in Rear of Truck, Back Glass Must Be In Vehicle or Bed Top Must Be Covered.

Interior:

1.          Driver’s Seat Must Be Located on the Left Side Similar to Stock.

2.          Dash May Be Removed.

3.          Factory Firewall Mandatory and Cannot Be Repositioned.

4.          Heater and Heater Ducts May Be Removed.

5.          NOTE: Excessive Body and Interior Modifications Moves Race Truck Up To Super Modified Class. 

6.          Vehicle Is Required to Carry On-Board a Fully Charged, Mounted Fire Extinguisher of A, B, or C Dry Chemical Type, 2.5 Pounds Minimum Capacity with Gauge in Cab.

7.          4-Point SFI Harness Required for Driver & Passenger.

Bumpers:

1.          Must Have Functional Front and Rear Bumpers.

2.          Bumpers Must Be Capped Off Even and Not Stick Out Past the Side Body Panels or the Tires. No Protruding or Sharp Edges. No Pipe or Tubing Unclosed/Uncapped Allowed.

3.          All Vehicles Must Have Tow Hooks Front and Rear.

Fuel Tanks/Cells:

1.          Gas Tank May be Removed and Replaced with a Fuel Cell.

2.          All Tanks/Cells Must Have Positive Locking or Screw Caps.

3.          Fuel Tanks/Cells Must Be Fully Secured. Minimum Two (2) Metal Straps Four 3/8 Bolts (No Nylon or Rubber Straps)

4.          All Fuel Lines Must Be Isolated from Driver’s Compartment.

Fuel:

1.      Gasoline or Racing Fuel Only. No Additives. (Ex. Aniline, Benzoyl, Benzene, Toluene, Xylene, Propylene Oxide, etc.)

2.      No Alcohol, Ether, Nitro Methane, Propylene Oxide, Nitrous Oxide, or Nitrous Devices (Nitrous Plates, Nitrous Solenoids, etc.) Prohibited.

3.      If Found Illegal, It Is An Automatic Disqualification.

Transmission:

1.          Stock Transmissions Only. Manual Valve Body Okay.

2.          Transmission Must Be Same as Offered By Manufacturer (ex. Ford in Ford, Chevy in Chevy, etc.)

3.          Aftermarket Shifters Allowed.

4.          Stall Converters Allowed.

5.          No Power Glides, Transbrakes, or Electric Transmission Controls Allowed.

Suspension:

1.          OEM/Stock Type Suspension.

2.          Must Maintain OEM Type Rear Leaf Spring Suspension in OEM Mounting Locations.

3.          No Aftermarket Shackles/Sliders Allowed.

4.          Lift Kits Are Allowed.

5.          No 4-Link, Z-Link Conversions Allowed. (Ex. Chevrolet Under Ford, Ford Under Chevrolet, etc.)

6.          No Traction Devices Allowed, Except Over the Spring Applications.

7.          No Ladder Bars Allowed.

8.          Maximum of Two Shocks Per Tire

Tires:

1.      All Tires Must Have Manufacturer’s DOT#, Manufacturer’s Stamp No Larger than a 33” (Thirty-three Inch) Tall or P Series Tire. Tire Cannot Exceed 10.5” (Ten and a Half Inches) Tread Width as Measured on Contact Area of the Ground.  No Cutting or Grooving. 

Radiator:

1.          Radiator Must Be in Stock Location.

2.          Manual Water Pumps Only in Stock Location and Driven by Engine.

3.          No Electric Water Pumps. Electric Fans Okay.

Battery:

1.      Must Not Be in Driver’s Compartment. Battery Must Be Securely Fastened and Shielded from Driver.

2.      Must Be Installed with 3/8” Bolts with a Minimum of a ¼” Steel Plate and/or Tube Frame Type Construction. (Bungee Ties or Rubber Straps Are Not Acceptable.)

3.      May Have Auxiliary Batteries. 

4.      On/Off Battery Disconnect Switch Is Required at the Rear on the Passenger Side. The Switch Must Be Located a Minimum of Twelve (12) Inches to a Maximum of Twenty-Four (24) Inches from the Side and a Maximum of Twelve (12) Inches from the Rear. 

Engine Specifics:

1.          Only One (1) Engine Per Vehicle.

2.          Engine Must Be Built with OEM/Stock Type Parts Only. Stock Rotating Assembly - Crank and Rods. 

3.          Stock Rod Lengths Only – Measured Center-to-Center. Plus or Minus 25-thousandths / .025 Tolerance from OEM Specifications Is Allowed. Rod Lengths Must Match Specific Block.

4.          Engine Has To Be in Stock Location with Stock Type Mounts. Factory Firewall Mandatory and Cannot Be Repositioned. 

5.          Engine Type Must Be Offered By Vehicle Manufacturer. NOTE: ½, ¾ or 1 Ton Engines Can Only Be Run in ½ Ton or Larger Vehicles. Small & Mid-Size Vehicles (Ex. Chevy S-10, Ford Ranger, Dodge Dakota, Toyota 4Runner, Jeep Cherokee, etc. Maximum of Six Cylinders) Must Run Engine Sizes That Are Offered for That Specific Vehicle (Ex. Big Blocks are Not Allowed in S-10s, Rangers, etc.).

6.          No Mixing of Engine and Body Style. (Ex. Ford in Ford, Chevy in Chevy, Dodge in Dodge, etc.)

7.          Camshaft Swaps Are Allowed. Only Hydraulic Flat Tappet Camshaft and Lifters Are Allowed. Hydraulic Lifters Cannot Be Altered. No Hydraulic Rollers Allowed. No Ceramic Lifters Are Allowed.

8.          VACUUM:  The AMRA Reserves the Right, At Its Own Discretion, to Change the Following Vacuum Inches on Any Engine or Engine Combination.

A.        Small Blocks up to 373 Cubic Inches Must Pull 17" of Vacuum at 1,000 RPM’s. No Vacuum Devices Allowed.

B.        All Big Blocks or Small Blocks Over 373 Cubic Inches Must Pull 19” of Vacuum at 1,000 RPM’s. No Vacuum Devices Allowed.

9.          Maximum Cubic Inch in ½ Ton Vehicles = 373 Cubic Inch

10.      Maximum Cubic Inch in ¾ & 1 Ton Vehicles = 477 Cubic Inch

11.      Maximum Over Bore Allowed = 70-Thousandths / .070

12.      Engines Over a 373 Cubic Inch Must Be in a ¾ or 1 Ton Long Wheel Base Vehicle with ¾ or 1 Ton Running Gear (Drivetrain, Axles, Springs, etc.)

13.      NOTE: Vehicles in the ½ Ton Category May Run ¾ or 1 Ton Running Gear, BUT This Does Not Qualify the Vehicle to Run Over a 373 Cubic Inch Limit Engine.

STOCK STROKE: No Stroking or De-Stroking. Plus or Minus 15-Thousandths / .015 Tolerance from OEM Specifications Is Allowed.

CRANK: OEM/Stock Only (No Scat, Eagle, nor Any Other Aftermarket Crank).

PISTONS: Aftermarket Pistons Allowed: Flat or Dish. No Dome Pistons Allowed

BLOCK: OEM/Stock Only. No Aftermarket.

RODS: OEM/Stock Rods And Rod Lengths Only, (No Scat, Eagle or Any Other Aftermarket Rods.) Stock Rod Lengths Only – Measured Center-to-Center +- .025 (Twenty-Five Thousandths). Rods Lengths Must Match Specific Block. (Ex. Chevy 327 & 350 = 5.700”, Chevy 400 = 5.565”, Chevy 396, 402, 427, & 454 = 6.135”; Ford 302 = 5.090”, Ford 351-C = 5.780”, Ford 351-W = 5.959”, Ford 351-M = 6.580”, Ford FE 390 = 6.488”, Ford 360 = 6.488”, Ford 400 = 6.580”, Ford 460 = 6.605”; Chrysler 318, 340, & 360 = 6.123”, Chrysler 383 & 400, = 6.358”, Chrysler 440 = 6.770”). Aftermarket Rod Bolts Are Allowed.

HEADS: Any OEM Production Cast Iron Head Allowed. No Grinding, Porting, Polishing, Grinding In Combustion Chamber, or Port Matching. No Aftermarket Heads (example:  No Bowtie, SVO, Mopar Performance, Dart, World Products, etc. Allowed).

            NOTE:

            Must Have Identifying Casting Numbers Located on Head.

Any After-Market Steel Valve Permitted.  TITANIUM VALVES PROHIBITED.

Cylinder Head May Have All of the Seats Replaced.  Any Valve Job Permitted, Bottom Out May Not Extend More Than .250 Inches Below Seat Angle. 

ROCKER ARMS: OEM Type Roller Tip Rockers Allowed.  Must Maintain Stock Rocker Arm Ratio.  No Rev Kits, Stud Girdles, or Full Rollers.   .  

INTAKE: Any Cast Iron or Aluminum Dual Plane Allowed. No High Rise Intakes, No Tork Links Intakes Allowed. No Single Plane. No Grinding, Porting, Polishing, or Port Matching.

ALLOWABLE PARTS: Double Roller Timing Chains, High Velocity Oil Pumps, Racing Oil Pans, and Pick-Up Screens, Up-Graded Fasteners. Oil Coolers Are Allowed.

No Aftermarket On-Board Computer and/or Analysis Equipment Allowed at Any Time. 

Carburetor Only:

1.          No Fuel Injection Allowed.

2.          Any Small Based Carburetor.

3.          May be Double Pumper, But Must Have Choke Horn. No ‘Dominator’ Style Big Base Carburetors Allowed.

4.          Throttle Pedal Must Be Positive Acting with Return Loop or Arm for Return In Case of Stuck Throttle. Three Return Springs are Mandatory, One (1) on Pedal and Two (2) on Carburetor. 

Electrical:

1. Vehicles Must Utilize a Single Ignition System.
2. Only One (1) Ignition Box, One (1) Coil and One (1) Wiring System Allowed. Aftermarket Ignition and Wires Okay.
3. No Aftermarket Devices such as Ignition Retarders or Advances.  

Exhaust:

1.          Headers Are Allowed. Headers Can Be Run Up or Down. 

Brakes:

1. Hydraulic Brakes Required.
2. Must Have Brakes on At Least Two (2) Wheels (Ex. Two Front Wheels or Two (2) Back Wheels).
3. Must Be Able to Stop Safely. 

SUPER STOCK CLASS

Safety Rules:

1.    Safety is the First Priority. If You Do Not Pass the Safety Tech-In, You DO NOT RACE.
ALL SAFETY RULES Apply - See Safety Rules.

Roll Cage:

1.          Must Have a Six (6) Point Roll Cage in the Cab Welded to Frame. Side Bar Must be Included on Driver and Passenger Side and Must Pass the Driver or Rider at a Point Midway Between the Shoulder and the Elbow.

2.          Must Be a Minimum of 1.5” Diameter.  With a Minimum Wall Thickness of .083 Chrome Molly or .120 Mild Steel Tubing.

3.          NOTE: Roll Bars/Sport Bars in the Bed of the Vehicle Are Not Considered an Acceptable Substitute for a Roll Cage.

4.          3/16 Minimum Speed Glass or Lexan:  Roll Cage Must Have Minimum Two (2) Half Inch (0.5 inch) Round Tubing Windshield Bars (May be ¾ Square Tubing) Welded From Top of Roll Cage to the Lower Roll Cage Bar or Firewall (Must Be Welded). 

Factory Glass Windshields:  Must Have Minimum Four (4) ½ Inch (0.5 inch) Round Tubing Windshield Bars (May be ¾ Square Tubing) Welded From Top of Roll Cage to the Lower Roll Cage Bar or Firewall (Must Be Welded).

5.          Doors May Be Trimmed for Roll Cage, But Not Gutted. "Gutted" Refers to Excessive Removal of the Interior Above and Beyond That Which Is Required for the Roll Cage And/Or Other Specific Rules Allow.  (May Be Gutted if Door Bars Are Built to Protrude Against Outer Door Skin.)  (Nascar or Dirt Track Type Construction)

6.          Doors Must Be Able to Securely Open & Close.  

Body and Frame:

1.      Original Body and Frame with No Modifications Other than Fender Cut-Outs. (Fender Cut-Outs Cannot Exceed More Than 24 Inches From Top of Bed Rail Down With a One Inch Tolerance or 8 Inches Up From the Bottom of Door Rocker Panel With a One Inch Tolerance.)

2.      Vehicles Must Have All Factory Sheet Metal, Except Tailgates.

3.      NOTE: Excessive Body and Interior Modifications Moves Race Truck Up To Super Modified Class.

4.      No Mixing of Engine and Body Style. Engine Type Must Be Offered By Manufacturer. (Ex. Ford Engine in Ford Chassis, Chevrolet Engine in Chevrolet Chassis, etc.)

5.      All Vehicles May Run ¾ or 1 Ton Running Gear (Drivetrain, Axles, Springs, etc.).

6.      No Shortening or Lengthening of Frame Allowed.

7.      If Fuel Cells, Radiators, and Batteries are Located in Rear of Truck, Back Glass Must Be In Vehicle or Bed Top Must Be Covered. 

Interior:

1.          Driver’s Seat Must Be Located on the Left Side Similar to Stock.

2.          Dash May Be Removed.

3.          Factory Firewall Mandatory and Cannot Be Repositioned.

4.          Heater and Heater Ducts May Be Removed.

5.          NOTE: Excessive Body and Interior Modifications Moves Race Truck Up To Super Modified Class.

6.          Vehicle Is Required to Carry On-Board a Fully Charged, Mounted Fire Extinguisher of A, B, or C Dry Chemical Type, 2.5 Pounds Minimum Capacity with Gauge in Cab.

7.          4-Point SFI Harness Required for Driver & Passenger. 

Bumpers:

1.          Must Have Functional Front and Rear Bumpers.

2.          Bumpers Must Be Capped Off Even and Not Stick Out Past the Side Body Panels or the Tires. No Protruding or Sharp Edges. No Pipe or Tubing Unclosed/Uncapped Allowed.

3.          All Vehicles Must Have Tow Hooks Front and Rear.  

Fuel Tanks/Cells:

1.          Gas Tank May be Removed and Replaced with a Fuel Cell.

2.          All Tanks/Cells Must Have Positive Locking or Screw Caps.

3.          Fuel Tanks/Cells Must Be Fully Secured. Minimum Two (2) Metal Straps Four 3/8 Bolts (No Nylon or Rubber Straps)

4.           

5.          All Fuel Lines Must Be Isolated from Driver’s Compartment.  

Fuel:

1.          Gasoline, Alcohol, or Racing Fuel Only.

2.          No Ether, Nitro, Nitro Methane, Propylene Oxide, Nitrous Oxide, or Nitrous Devices (Nitrous Plates, Nitrous Solenoids, etc.) Allowed.

3.          If Found Illegal, It Is an Automatic Disqualification. 

Transmission:

1.          Any OEM Production Type Transmission Allowed.

2.          Aftermarket Shifters Allowed.

3.          Stall Converters Allowed.

4.          Power Glides Okay in Any Vehicle (Ex. Ford, Chevy, Chrysler, etc.)

5.          No Transbrakes or Electric Transmission Controls.

6.          All Automatic Transmissions Must Have a SEMA Approved Shield or Blanket.  

Suspension:

1.          OEM/Stock Type Suspension.

2.          Must Maintain OEM Type Rear Leaf Spring Suspension in OEM Mounting Locations.

3.          No Aftermarket Shackles/Sliders Allowed.

4.          Lift Kits Are Allowed.

5.          All Vehicles May Run ¾ or 1 Ton Running Gear (Drivetrain, Axles, etc.).

6.          Can Change / Up-Grade Axles, Rear End Housings.

7.          No 4-Link, Z-Link Conversions Allowed.

8.          No Traction Devices Allowed, Except Over the Spring Applications.

9.          No Ladder Bars Allowed.

10.      Maximum of Two Shocks Per Tire. 

Tires:

1.    All Tires Must Have DOT#. No Cutting or Grooving. 

Radiator:

1.          Radiator May Be Relocated to the Bed of the Vehicle.

2.          Electric Fans and Electric Water Pumps Are Okay.

3.          Radiator Must Be Securely Fastened and Shielded from Driver.

4.          Must Not Be in the Driver’s Compartment.  

Battery:

1.          Must Not Be in Driver’s Compartment. Must Be Installed with 3/8” Bolts with a Minimum of a ¼” Steel Plate and/or Tube Frame Type Construction. (Bungee Ties or Rubber Straps Are Not Acceptable.)

2.          May have Auxiliary Batteries. 

3.          On/Off Battery Disconnect Switch Is Required at the Rear on the Passenger Side. The Switch Must Be Located a Minimum of Twelve (12) Inches to a Maximum of Twenty-Four (24) Inches from the Side and a Maximum of Twelve (12) Inches from the Rear. 

Engine Specifics:

1.          Only One (1) Engine Per Vehicle.

2.          Engine Has to Be in Stock Location with Stock Type Mounts. Factory Firewall Mandatory and Cannot Be Repositioned. 

3.          Engine Type Must Be Offered By Vehicle Manufacturer. NOTE: ½, ¾ or 1 Ton Engines Can Only Be Run in ½ Ton or Larger Vehicles. Small & Mid-Size Vehicles (Ex. Chevy S-10, Ford Ranger, Dodge Dakota, Toyota 4Runner, Jeep Cherokee, etc. Maximum of Six Cylinders) Must Run Engine Sizes That Are Offered for That Specific Vehicle (Ex. Big Blocks are Not Allowed in S-10s, Rangers, etc.).

4.          No Mixing of Engine and Body Style. (Ex. Ford in Ford, Chevy in Chevy, Dodge in Dodge, etc.)

5.          Camshaft Swaps Are Allowed. Only Hydraulic Flat Tappet Camshaft and Lifters Are Allowed. Camshaft and Lifters Must Be Hydraulic. Hydraulic Lifters Cannot Be Altered. No Hydraulic Rollers Allowed. Ceramic Lifters Allowed.

6.          Must Pull 14" of Vacuum at 1,000 RPMs. No Vacuum Devices.

7.          Maximum Cubic Inch Small Block = 412 CID.

8.          Maximum Cubic Inch Big Block Cubic = 477 CID.

STROKE: Small Block Motors Can Be Stroked or De-Stroked. Big Blocks Cannot Be Stroked or De-Stroked.

CRANK: Aftermarket Crankshaft Okay.

PISTONS: Aftermarket Pistons Allowed: Flat, Dish, & Dome Pistons Allowed.

BLOCK: Any Cast Iron Block Including Aftermarket Block is Okay.

RODS: Aftermarket Rods Okay. Aftermarket Rod Bolts Are Allowed.

HEADS: Any OEM Production Cast Iron Heads Are Allowed. Any Modifications Are Allowed. GT40 & Chevy Vortec Heads Are Allowed. No Aftermarket Heads (Ex: No Dart, Brodix, World Product, Mopar Performance, Bowtie, SVO, etc.).

   NOTE:

Must Have Identifying Casting Numbers Located on Head.

ROCKER ARMS: Roller Rocker Arms Okay. Screw-In Studs & Guide Plates Are Allowed.

INTAKE: Any Aftermarket Aluminum Intake Allowed. (Except Tunnel Ram Types & Sheet Metal Intakes.)

ALLOWABLE PARTS: Double Roller Timing Chains, High Velocity Oil Pumps, Racing Oil Pans, and Pick-Up Screens, Up-Graded Fasteners. Oil Coolers Are Allowed.

No Aftermarket On-Board Computer and/or Analysis Equipment Allowed at Any Time. 

Carburetor Only:

1.          Any Single, Small Base Carburetor Is Allowed. May be Double Pumper. No ‘Dominator’ Style Big Base Carburetors Allowed.

2.          Throttle Pedal Must Be Positive Acting with Return Loop or Arm for Return In Case of Stuck Throttle. Three Return Springs are Mandatory, One (1) on Pedal and Two (2) on Carburetor.

3.          No Fuel Injection Allowed. 

Electrical:

1.          Any Ignition Allowed.

2.          No Magnetos Allowed.

3.          No Aftermarket Devices such as Ignition Retarders or Advances.  

Exhaust:

1.    Headers Are Allowed. Headers Can Be Run Up or Down. 

Brakes:

1.          Driveline Brakes Okay.

2.          Must Have Brakes on at Least Two (2) Wheels (Ex. Two Front Wheels or Two (2) Back Wheels).

3.          Must Be Able to Stop Safely. 

MODIFIED CLASS

Safety Rules:

1.    Safety is the First Priority. If You Do Not Pass the Safety Tech-In, You DO NOT RACE.
ALL SAFETY RULES Apply - See Safety Rules.

Roll Cage:

1.          Must Have 6-Point Roll Cage Welded to Frame. Side Bar Must Be Included on Driver and Passenger Side and Must Pass the Driver or Rider at a Point Midway Between the Shoulder and the Elbow.

2.          Must Be a Minimum of 1.5” Diameter.  With a Minimum Wall Thickness of .083 Chrome Molly or .120 Steel Tubing.

3.          3/16 Minimum Speed Glass or Lexan:  Roll Cage Must Have Minimum Two (2) Half Inch (0.5 inch) Round Tubing Windshield Bars (May Be ¾ Square Tubing) Welded From Top of Roll Cage to the Lower Roll Cage Bar or Firewall (Must Be Welded).  (No Bolt-In Types, No Nylon Window Straps, and No Rebar Allowed).

4.          Doors May Be Trimmed for Roll Cage, But Not Gutted. "Gutted" Refers to Excessive Removal of the Interior Above and Beyond That Which Is Required for the Roll Cage And/Or Other Specific Rules Allow.  (May Be Gutted If Door Bars Are Built To Protrude Against Outer Door Skin.)  (Nascar or Dirt Track Type Construction).

5.          Doors Must Be Able to Securely Open & Close. 

6.          Both Side Windows Must Have Either Web-Type Safety Net with Latch-Link or Spring Loaded Release Mechanism, Fastened to Roll Cage. Mesh or String-Type Nets Are Approved. Net Must Be Secured in Place and Centered in the Door Area Covering the Side Window & Fastened to the Roll Cage Horizontal Member When the Vehicle is in Competition. Driver and Passenger Window Safety Nets Must Be Attached to Roll Cage. (Cannot Be Attached to the Door or Door Frame.) Must Be Located on Both Sides of Vehicle If Vehicle Is Equipped with Two (2) Seats.

7.          5-Point SFI Harness Required for Driver & Passenger. 

Body and Frame:

1.          Original Body and Frame with No Excessive Modifications Other than Fender Cut-Outs. (Fender Cut-Outs Cannot Exceed More Than 24 Inches From Top of Bed Rail Down With a One Inch Tolerance or 8 Inches Up From the Bottom of Door Rocker Panel With a One Inch Tolerance.)

2.          Vehicles Must Have All Factory Sheet Metal, Except Tailgates.

3.          No Mixing of Engine and Body Style. Engine Type Must Be Offered By Manufacturer. (Ex. Ford Engine in Ford Chassis, Chevrolet Engine in Chevrolet Chassis, etc.)

4.          All Vehicles May Run ¾ or 1 Ton Running Gear (Drivetrain, Axles, etc.).

5.          No Shortening or Lengthening of Frame Allowed.

6.       All Stock Automotive Glass Must Be Removed from Vehicle (No Stock Type  Glass Allowed in Windshield, Doors, Side Windows, or Back Window). If Fuel Cell, Radiators, and Batteries are Located in Rear of Truck, Back Glass Must Be In Vehicle or Bed Top Must Be Covered.  3/16 Minimum Speed Glass or Lexan ONLY.

7.      Mud Flaps Must Be on the Rear of All Vehicles. DOT Approved Material or .25 Inch Thick Rubber Must Be Fastened Securely to Rear of the Vehicle and Cover the Entire Width of the Tires. No Strapping or Self-Tapping Screws Are Allowed.

8.      All Fenders Must Cover the Entire Width Of The Tires.

9.      Maximum Tire Width:  From Outside to Outside 85 Inches with a Two Inch Tolerance.  

Interior:

1.          Driver’s Seat Must Be Located on the Left Side Similar to Stock.

2.          Dash May Be Removed.

3.          Heater and Heater Ducts May Be Removed.

4.          NOTE: Excessive Body and Interior Modifications Moves Race Truck Up To Super Modified Class.

5.          Mid-Plates and Motor Plates Are Allowed, BUT Factory Firewall Mandatory and Cannot Be Repositioned.

6.          Must Retain Original Floor Pan.

7.          Vehicle Is Required to Carry On-Board a Fully Charged, Mounted Fire Extinguisher of A, B, or C Dry Chemical Type, 2.5 Pounds Minimum Capacity with Gauge in Cab.

8.          5-Point SFI Harness Required for Driver & Passenger. 

Bumpers:

1.          Must Have Functional Front and Rear Bumpers.

2.          Bumpers Must Be Capped Off Even and Not Stick Out Past the Side Body Panels or the Tires. No Protruding or Sharp Edges. No Pipe or Tubing Unclosed/Uncapped Allowed.

3.          All Vehicles Must Have Tow Hooks Front and Rear.  

Fuel Cells:

1.          Gas Tank Must Be Removed and Replaced with a Fuel Cell.

2.          Fuel Cell Must Have Positive Locking or Screw Caps.

3.          Fuel Cell Must Be Fully Secured. Minimum Two (2) Metal Straps Four 3/8 Bolts (No Nylon or Rubber Straps)

4.