2027 (2028) Rules
Updated 10/4/26DRX Race Series was created to allow multiple generations and variations of 4cyl. truck bodied race vehicles to compete in one class. The goal is safe, fun, competitive, fair racing.
The following rules can and will be modified as needed by DRX Race Series to ensure fair, safe racing. If you are unsure of the rule, or would like to discuss any rule written or proposed, please contact DRX Race Series.
To be eligible for DRX Race Series event and / or DRX Championship Payout you must run required DRX Race Series decals (3) in required location. Safety Rules Each truck must meet the promoter or sanctioning body safety rules of each event participated in. It is the competitor / driver of records responsibility to know and meet these requirements and must pass promoters or sanctioning body’s tech inspection per race. General rules (DRX Race Series reserves the right to modify any / all rules for safety or improved competition) Two wheel drive (rear wheels) only Front engine Turbo 350 transmission, GM or aftermarket cases/bell housings allowed. Solid axle rear (Ford 9” aftermarket platform only), no IRS Truck bodies only, must start each race with a complete body. DRX Race Series must approve each body for the season or race. Body Body must be truck body and approved by DRX Race Series to ensure consistency. Must start race with complete body. Must run supplied DRX Race Series decals. Engine The following are approved DRX Race Series engines: GM ECOTEC 2.4 liter. No other engine shall bepermitted without PRIOR approval by DRX Race Series and notification to all other competitors. Engine must retain all stock components, configurations and specifications as manufactured. “As manufactured” and “stock configurations and specifications” refer to as manufactured components from GM, stamped with the GM logo or associated factory part number. Alterations to any component in any manor (physical, chemical, or other) shall not be permitted unless detailed below: Aftermarket fasteners shall be permitted. Equivalent brand components to stock GM components may be substituted for the following components: Bearings, seals, spark plugs, oil filter, timing chain, and associated components. Maximum overbore is 0.010”. Aftermarket connecting rod Molnar part #CH5659JCB4-A are approved, any aftermarket steel connecting rod supplier may apply for approval. Aftermarket pistons are permitted to maximum overbore of .010 Pistons must retain OEM sizing and dimensions (except overbore). This includes ring land and wrist pin height, as well as piston dome dimensions. Maximum compression ratio is 10.75:1. (Allows for head and block cleanup during rebuild). Compression ratio may be checked at any event prior or post race. Modifications to the stock engine block to allow for external oil filters/coolers are permitted. All internal components must be in place and be operational at all times (i.e. stock balancer shafts and drive). Engines must be sealed by one of the approved engine builders Wik’s Racing Engines Moruzzi Race Motors Danzio Performance Engineering GM injectors only Any missing or altered engine seals will result in a DQ and possible ban. Engine seals may be inspected pre-race and/or post race. DRX Race Series may implement an engine Claiming Rule at any time with minimum 60 days notice. ECU Haltech, MEFI, Life Racing, Entrol are allowed ECU’s. If you have a different brand, contact DRX Race Series for approval process. Transmission Turbo 350 manual valve body transmissions only GM cases allowed Aftermarket bell housings allowed Aftermarket cases allowed Maximum 3 forward gears No underdrives allowed No overdrives allowed Weight Minimum weight 3000lb race ready. Exhaust Header design is open Header brand is open Muffler is required Fuel Cell Maximum 32 gallon fuel cell allowed Must meet promoter or sanctioning body safety requirements. Rear Axle Gear ratio limited to 7.00:1 maximum Gear ratio may be checked pre-race and/or post race Maximum 40 spline axle Wheelbase Wheelbase is limited to 111” (2028 114”) maximum measured at ride height Can be measured pre-race and/or post race Track Width Track width is limited to 82” (2028 85”) outside of tire at widest part of tire Can be measured pre-race and/or post race Tires Maximum tire height 35”. Must be DOT approved tire. Tires must meet minimum weight rating for truck weight. Tire brand is open. Wheels Beadlock and non-beadlock wheels are accepted. Bolt pattern is open Wheel brand is open Shocks Maximum 3” dia. 4 bypass allowed Maximum 2.5” coilover allowed Shock brand is open
Bump StopsFront Hydraulic or Urethane allowedRear Hydraulic or Urethane allowed Brakes Maximum 13 dia. rotors Maximum 4 piston calipers Brake rotor and caliper brand open No cutting or turning brakes allowed Seats Seats must meet promoter or sanctioning body safety requirements Seat brand is open Seat belts Seat belts must meet promoter or sanctioning body safety requirements Seat belt brand is open Lights Lighting brand is open Radio Radio brand is open Points Please see AORC Point System for Base Points, Race Drop and Tie-Breaker Policy https://americanoffroadracingchampionship.com/standings/rules/ 2027 Race Payout - Minimum $25,000 committed - $5,000 per AORC race event - in ADDITION to any AORC Payout 1st $2500 2nd $1000 3rd $ 750 4th $ 500 5th $ 250 2027 Championship Payout - Minimum $25,000 committed - in ADDITION to any AORC Payout - Must Race Minimum 4 of 5 AORC Race Events to be eligible for DRX Race Series Championship Payout. Those competitors not meeting minimum 4 race requirement will be eliminated from Points Championship and next competitor that meets the 4 race minimum will move up accordingly. 1st $10,000 2nd $ 5,000 3rd $ 2,500 4th $ 2,000 5th $ 1,750 6th $ 1,500 7th $ 1,250 8th $ 1,000
To be eligible for DRX Race Series event and / or DRX Championship Payout you must run required DRX Race Series decals (3) in required location. Safety Rules Each truck must meet the promoter or sanctioning body safety rules of each event participated in. It is the competitor / driver of records responsibility to know and meet these requirements and must pass promoters or sanctioning body’s tech inspection per race. General rules (DRX Race Series reserves the right to modify any / all rules for safety or improved competition) Two wheel drive (rear wheels) only Front engine Turbo 350 transmission, GM or aftermarket cases/bell housings allowed. Solid axle rear (Ford 9” aftermarket platform only), no IRS Truck bodies only, must start each race with a complete body. DRX Race Series must approve each body for the season or race. Body Body must be truck body and approved by DRX Race Series to ensure consistency. Must start race with complete body. Must run supplied DRX Race Series decals. Engine The following are approved DRX Race Series engines: GM ECOTEC 2.4 liter. No other engine shall bepermitted without PRIOR approval by DRX Race Series and notification to all other competitors. Engine must retain all stock components, configurations and specifications as manufactured. “As manufactured” and “stock configurations and specifications” refer to as manufactured components from GM, stamped with the GM logo or associated factory part number. Alterations to any component in any manor (physical, chemical, or other) shall not be permitted unless detailed below: Aftermarket fasteners shall be permitted. Equivalent brand components to stock GM components may be substituted for the following components: Bearings, seals, spark plugs, oil filter, timing chain, and associated components. Maximum overbore is 0.010”. Aftermarket connecting rod Molnar part #CH5659JCB4-A are approved, any aftermarket steel connecting rod supplier may apply for approval. Aftermarket pistons are permitted to maximum overbore of .010 Pistons must retain OEM sizing and dimensions (except overbore). This includes ring land and wrist pin height, as well as piston dome dimensions. Maximum compression ratio is 10.75:1. (Allows for head and block cleanup during rebuild). Compression ratio may be checked at any event prior or post race. Modifications to the stock engine block to allow for external oil filters/coolers are permitted. All internal components must be in place and be operational at all times (i.e. stock balancer shafts and drive). Engines must be sealed by one of the approved engine builders Wik’s Racing Engines Moruzzi Race Motors Danzio Performance Engineering GM injectors only Any missing or altered engine seals will result in a DQ and possible ban. Engine seals may be inspected pre-race and/or post race. DRX Race Series may implement an engine Claiming Rule at any time with minimum 60 days notice. ECU Haltech, MEFI, Life Racing, Entrol are allowed ECU’s. If you have a different brand, contact DRX Race Series for approval process. Transmission Turbo 350 manual valve body transmissions only GM cases allowed Aftermarket bell housings allowed Aftermarket cases allowed Maximum 3 forward gears No underdrives allowed No overdrives allowed Weight Minimum weight 3000lb race ready. Exhaust Header design is open Header brand is open Muffler is required Fuel Cell Maximum 32 gallon fuel cell allowed Must meet promoter or sanctioning body safety requirements. Rear Axle Gear ratio limited to 7.00:1 maximum Gear ratio may be checked pre-race and/or post race Maximum 40 spline axle Wheelbase Wheelbase is limited to 111” (2028 114”) maximum measured at ride height Can be measured pre-race and/or post race Track Width Track width is limited to 82” (2028 85”) outside of tire at widest part of tire Can be measured pre-race and/or post race Tires Maximum tire height 35”. Must be DOT approved tire. Tires must meet minimum weight rating for truck weight. Tire brand is open. Wheels Beadlock and non-beadlock wheels are accepted. Bolt pattern is open Wheel brand is open Shocks Maximum 3” dia. 4 bypass allowed Maximum 2.5” coilover allowed Shock brand is open
Bump StopsFront Hydraulic or Urethane allowedRear Hydraulic or Urethane allowed Brakes Maximum 13 dia. rotors Maximum 4 piston calipers Brake rotor and caliper brand open No cutting or turning brakes allowed Seats Seats must meet promoter or sanctioning body safety requirements Seat brand is open Seat belts Seat belts must meet promoter or sanctioning body safety requirements Seat belt brand is open Lights Lighting brand is open Radio Radio brand is open Points Please see AORC Point System for Base Points, Race Drop and Tie-Breaker Policy https://americanoffroadracingchampionship.com/standings/rules/ 2027 Race Payout - Minimum $25,000 committed - $5,000 per AORC race event - in ADDITION to any AORC Payout 1st $2500 2nd $1000 3rd $ 750 4th $ 500 5th $ 250 2027 Championship Payout - Minimum $25,000 committed - in ADDITION to any AORC Payout - Must Race Minimum 4 of 5 AORC Race Events to be eligible for DRX Race Series Championship Payout. Those competitors not meeting minimum 4 race requirement will be eliminated from Points Championship and next competitor that meets the 4 race minimum will move up accordingly. 1st $10,000 2nd $ 5,000 3rd $ 2,500 4th $ 2,000 5th $ 1,750 6th $ 1,500 7th $ 1,250 8th $ 1,000
Rules, Points and Payouts