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Outlaw Pro Mod (OPM)


Outlaw Pro Mod is a 1/8th mile class designed for American and Import production vehicles. Entries have the option to run either an 8 CYL, small block or big block engine combination. All engine combinations are allowed to use gasoline or methanol fuel. The use of nitromethane is prohibited.

Note: This set of class rules is presented to all competitors under the assumption that any
modifications not specifically written within these rules shall be deemed illegal, unless the
competitor has the expressed written consent from the ADRL Tech Director.

This class will be run on a 16 car qualified heads-up field, NHRA Pro Style Ladder on a .400 Pro Tree.

Import 6 CYL* Turbo 2100 lbs
Small Block Nitrous 2100 lbs
Small Block Blower 2100 lbs
Small Block Twin Turbo 2100 lbs
Big Block Nitrous up to 899 2300 lbs
Big Block Nitrous 900+ 2375 lbs
Big Block/Hemi Hi-helix/Roots 2450 lbs
Big Block/Hemi Twin Turbo 88mm 2450 lbs
Big Block/Hemi Twin Turbo 94mm 2550 98mm add 50 lbs
Big Block/Hemi Screw-Type C Rotor 116% Maximum 2500 lbs

*Engine/Power adder combination must be preapproved by ADRL Tech Committee.
Small Block: Maximum engine size for all small block entries is 500 cubic inches. 400 cubic inch or smaller boosted engines may use nitrous oxide as a second power adder at a weight penalty of 50 lbs. Nitrous oxide will always be considered a second power adder.
Nitrous: Big block engines are limited to 960 cubic inches. Maximum bore space is 5.3 inches.
Hi-Helix/Roots Supercharger: Maximum Hi-Helix/roots Supercharger permitted is 14-71. Any
overdrive permitted for 14-71 superchargers. Maximum bore space is 5.0 inches
Screw-Type Supercharger: Hemi engines are limited to 116% overdrive. All other engines have no overdrive limitations. Maximum bore space is 5.0 inches.
Twin Turbo: Maximum turbocharger size is 98mm. Maximum bore space is 5.0 inches. Twin
98mm combinations are not permitted the use of a lock-up torque convertor.

Boosted small block engines 400 cubic inches or smaller are permitted the use of nitrous oxide as a second power adder and must add 50lbs to their original base weight.
Single turbocharged combinations may deduct 100 lbs. from twin turbocharged base weight.
All weights are with the driver and are rounded up to the 5lb increment.



Engine must be an internal combustion, 90-degree V-8 automotive type engine. Or Import six
cylinder combinations that must be preapproved by ADRL Tech Committee.
Maximum of 10% of total vehicle wheel base as measured from the centerline of the forward
front spindle to center of front spark plug hole.
SFI Spec 18.1 balancer is required.
Hemi, canted valve or wedge heads permitted. Billet heads are permitted. Maximum of one
spark plug per cylinder allowed.
Any intake manifold permitted and it is mandatory that all intake manifolds run a ADRL / NHRA
accepted burst panel.
Any ADRL accepted nitrous system allowed. Push systems are permitted. The use of water
injection on nitrous assisted power adder combinations is permitted. Water is the only
substance that may be used in water injection systems. The use of any agents other than
nitrous oxide in the nitrous system is prohibited. Nitrous systems must only use gasoline for the fuel enrichment circuit. Nitrous systems must only be activated by a wide-open throttle switch.Maximum of two 15 pound nitrous bottles are allowed. All nitrous bottles must be stamped asmeeting the minimum DOT 1800 pound rating.
Hi-helix or standard helix Roots type supercharger is allowed. Manifold burst panel meeting SFI
Spec 23.1 plus restraint system meeting SFI Spec 14.2, including injector restraint straps
mandatory. Cast or billet cases permitted.
All screw-type superchargers must have a SFI 34.1 certification. . Manifold burst panel meeting SFI Spec 23.1 plus restraint system meeting SFI Spec 14.2, including injector restraint straps mandatory. Cast or billet cases permitted.
Turbochargers are allowed a maximum impeller inducer of 98mm/3.858 inches. Compressor
wheel/impeller must only be constructed of cast or billet aluminum. Turbocharger is permitted a fresh air source from either the front bumper or grille area of the vehicle.
Turbocharger size will be verified by one or both of the following methods:
1. By measuring the housing bore at the leading edge of the impeller wheel. The maximum
diameter of the housing bore at the leading edge of the impeller wheel may not exceed
2mm more than the maximum allowable turbocharger size permitted in this class.
By measuring the impeller inducer wheel where the leading edge of the inducer wheel meets
the housing. The wheel/blade contour from the inducer to the exducer must be continuous
without steps. Twin 98mm turbocharged combinations are not permitted the use of a lock-up
torque convertor.
Single turbocharged entries are unlimited in turbocharger size.
Intercoolers are only allowed on centrifugal and turbocharged entries. Air-to-Air or Air-to-
Water intercoolers are the only intercoolers allowed. Air, water and ice are the only allowed
substances in the intercoolers or the intercooler reservoirs. The use of any other agents is
Any oil system permitted. All pressurized flexible oil lines must pass a minimum 750 psi 30
second test.
All entries must be equipped with a properly fitting lower engine ballistic/restraint device or a
belly pan. The pan may be constructed from composite or metal. It must have vertical walls of
at least 2 inches in height. Pan must extend from frame rail to frame rail and must extend from front of the engine mounting plate to the rear of the engine block. Pan must be attached with a minimum of three attachment points per side.
Any radiator, water pump and electrically driven fan are permitted.
Any exhaust system permitted. All exhaust systems must be directed out of body and away
from driver and fuel tank.
Any electronic, mechanical or belt driven fuel pumps are allowed. Electronic fuel pumps must
shut off with the master electric cut-off switch. Fuel cell must have a pressure cap and be
vented to the outside of the body. Front mounted fuel cells must meet SFI Spec 28.1 and be
mounted between the frame rails and enclosed in a round tube frame. A round tube frame
must be constructed of a minimum of 1 ¼-inch O.D. x .065-inch chrome moly tubing. Artificial
cooling or heating of fuel (i.e., cool cans, ice, Freon, etc.) prohibited. Circulating systems that
are not part of the normal fuel pump system are prohibited.
Any aftermarket electronic or mechanical fuel injection may be used. Fuel injector size and or
type are unlimited.
Any number and/or type of throttle body permitted.
Any injector scoop permitted.
Any number and/or type of carburetors may be used.
Throttle must be manually operated by the driver’s foot.
The use of propylene oxide is and nitromethane is prohibited. Gasoline, as defined by the
ADRL, is a mixture of hydrocarbons only. The use of methanol fuel is only for naturally
aspirated, turbocharged and supercharged engine combinations. Methanol must be pure U.S. federal grades A and AA without the addition of chemicals additives, masking agents or anyother substances. The ADRL reserves the right to check fuel at any time during competition. Failure to pass fuel check is grounds for disallowance of the run during qualifying and also disqualification from the event during eliminations.


Flywheel and clutch meeting SFI Spec 1.3, 1.4, or 1.5 is mandatory. Lock-up style clutches are
permitted. Flywheel shield meeting SFI Spec 6.2 or 6.3 is mandatory.
Aftermarket planetary, clutch less, OEM or aftermarket automatic transmission permitted. All
transmissions must be equipped with a SFI Spec 4.1 transmission shield. OEM or aftermarket
automatic transmissions must use a SFI Spec 30.1 flex plate shield and a SFI Spec 29.1 flex plate. Aftermarket converter drive units permitted. All entries using a torque converter must be equipped with a neutral safety switch and a reverse lockout. Lock-up style torque convertors are permitted. Automated, electric, or pneumatic shifting devices permitted on all transmission types.
Driveshaft meeting SFI Spec 43.1 is mandatory. Each end of the driveshaft must have round
360-degree driveshaft loops within 6 inches of U-joints. A full 360-degree driveshaft tube is
mandatory over the yoke, and needs to extend from the transmission tail shaft a minimum
length of 12 inches. Minimum thickness of tube housing is .050 inch chrome moly or titanium.
Two-piece accepted with minimum 6 3/8 inch Grade 8 bolts.
Any automotive type rear end permitted. Full floating or live axle type rear ends are mandatory on all supercharged and turbocharged entries. Fabricated flange rear ends with miss/self aligning bearings are only permitted to be used with naturally aspirated and nitrous assisted combinations. Aftermarket axles with a minimum of 5/8 inch diameter studs and axle retention device are mandatory. Titanium wheels studs are prohibited.


Automated brakes are prohibited. The application and release of the brakes must be a function of the driver. Four wheel hydraulic disc brakes are mandatory. Steel brake lines are mandatory. Brake lines must be out of flywheel and driveline areas. Line-lock is permitted only on the front wheels. One line-lock solenoid with one button is permitted. Dual master cylinder is mandatory and must be mounted above the lower frame rails.
Any automotive type steering system permitted. Commercially available quick disconnect
steering wheel meeting SFI Spec 42.1 is mandatory. Minimum steering wheel diameter is 11
Full automotive type systems are mandatory. A minimum of one hydraulic shock absorber per
wheel is mandatory. Fabricated units are permitted. Rigid mounted suspensions or straight
front axles are prohibited
Wheelie bars are required with nonmetallic wheels.


Chassis must have a SFI 25.1E or 25.2 certification and have either a NHRA or IHRA serialized
sticker attached to the roll cage before competition. A valid NHRA serialized sticker is
mandatory at an NHRA Member Track.
Minimum wheelbase is 100 inches and maximum is 115 inches. Full-sized trucks are allowed a
maximum of 140 inches. Mid-sized trucks (i.e., S-10, Ranger, and Dakota) are allowed a
maximum of 125 inches. Maximum wheelbase variation from left to right is 2 inches.
A minimum of 3 inches from the front of the vehicle to 12 inches behind front spindle
centerline is mandatory. A minimum of 2 inches for the rest of the vehicle is mandatory (except
for oil pan and exhaust headers).


Tires may not extend outside the body line. All tires must have the manufacturer, model and
size information clearly designated on the tire.
SFI Spec 15.1 or 15.3 rear wheels measuring 16x16 inches with double bead locks or liners
mandatory. Lightening or any other modification to rear wheels is prohibited. Wheels discs or
covers are prohibited.


Driver’s seat must be a minimum height of 24 inches.
Driver compartment interior must be aluminum, steel or carbon fiber. The use of magnesium is prohibited. Sheet metal may not extend into rear window or be higher than the wheel tubs. The trunk must be completely separate from driver’s compartment using a firewall.


American or Import  production body styles permitted. One piece funny car bodies are prohibited. Lightweight aftermarket replica body components are permitted as long as they have the same appearance as the body being used. Both doors must be functional from inside and outside of the vehicle. Front overhang is limited to 45 inches measuring from the front spindle. If the body selected has an overhang of less than 45 inches, a ADRL accepted extension may be used to reach the maximum length. All entries must have a metal deflector or firewall extension between the fenders and the leading edge of the doors so that fire, liquids, etc. cannot come into the driver’s compartment.
Hood scoops are permitted and are allowed to have one opening. Vehicles that are equipped
with an EFI system are not required to run a hood scoop. Carburetors must be completely
covered by the hood or hood scoop.
A minimum of .024 inch steel or titanium firewall is mandatory. The use of aluminum,
magnesium or carbon fiber in the construction of a firewall is prohibited.
Full windows are mandatory. Windows must be closed and not operative. Cutting or notching
of windshield permitted if covered by the hood or hood scoop. Minimum of a 4 inch diameter
opening on side windows is mandatory. Windows can be made from 1/8th inch polycarbonate material.
Driver’s side floor pan must be steel and welded into place. The remainder of the floor section can be .024 inch steel, .032 inch aluminum, or carbon fiber. The use of magnesium is
Rear wheel wells/tubs must be separate from each tire.
Any style of rear wing/spoiler is permitted. Any adjustments to the wing/spoiler during a run
are prohibited.
One functional taillight is mandatory.
All cars in competition must be painted or wrapped. Advertising graphics are permitted on the body. In order to be eligible for the ADRL official contingency program, all contingency
sponsors’ decals must be easily visible and located on the outside of the vehicle. Failure to do so can result in the driver forfeiting all claimed contingencies for that particular event. The
ADRL requires that all entries run the following decals:
1. ADRL Drag Racing Series: Decals (2) must be located on each side of vehicle. Either on
the side windows or decals can be located on the body right beside the side windows.
2. Class Sponsor: Decal must be located on the passenger’s side lower portion of the
3. Class & Competition Numbers: Numbers must be easily visible/legible and located on
the front, back, and both side windows.



Maximum of two batteries are allowed.
Maximum of one magneto and or distributor is allowed. Maximum of only one spark plug per
cylinder is allowed. Magneto systems are limited to using a single 44 amp maximum output
system. The use of multiple ignition coils (one per cylinder) instead of using a magneto or
distributor is allowed. Any electronic ignition system is allowed.
On board or remote starters permitted.
A master cutoff switch is mandatory.



DRIVER RESTRAINT SYSTEM: SFI 16.1 certification required. 7 point system recommended.
FIRE  SYSTEM: SFI  17.1  system required.  System  must  contain  a  minimum of  20  lbs of  fluid  or  gas  fire suppression agent. One nozzle required inside driver’s compartment must be directed at driver’s feet. Two or more nozzles must be directed at front of engine and fuel cell. All fire suppression must be released with a single actuation (i.e. single handle, button or lever).
HEAD AND NECK RESTRAINT: SFI 38.1 required. An aluminum skid plate located above driver’s head is recommended.
HELMET: SN-2010 or newer, SFI 31.2 or 41.2 required. Use of open face helmet prohibited. Eject Helmet Removal System (Part # SDR 890-01-30) or equivalent required.
MASTER ELECTRICAL CUTOFF: Required. Must be clearly labeled “PUSH OFF”.
PARACHUTES: Dual parachutes required. Separate shroud-line mounting points with 1/2” sleeved grade 8 bolts required. Chute Deployment Mandatory at the end of every pass.  
PROTECTIVE CLOTHING: A driver’s suit meeting SFI 3.2A/15, gloves meeting SFI 3.3/15, shoes meeting SFI 3.3/15 and a head sock meeting SFI 3.3 required for Nitrous applications, and SFI 3.2A/20 driver suit, gloves meeting SFI 3.3/20, shoes meeting SFI 3.3/20 and a head sock meeting SFI 3.3 required for Alcohol, Blown and Turbo applications. A head sock is not required when a helmet manufactured with a skirt meeting SFI 3.3 is used.
RF SHTUDOWN RECEIVER: Properly functioning Electrimotion shutoff device (part numbers SB001 and RF001) recommended.
ROLL BAR PADDING: SFI 45.1 required.
SUPERCHARGER RESTRAINT: SFI 14.2 minimum required on all roots-type superchargers. SFI 14.21 required on all screw-type superchargers. You must utilize the entire assembly including bag, plate and straps.
TRANSMISSION: All transmissions must be covered by a one piece SFI 4.1 restraint.
UPHOLSTERY: Driver’s seat foamed with energy absorbing material, formed for the driver and covered with flame retardant material is required.


Computer/data recorders are permitted and must standalone and to be only used for
information gathering purposes.

The participant agrees that by entering an event, the participant acknowledges that the event site is safe and suitable for racing and the participant acknowledges that by participating in the event the participant may suffer bodily injury, death, or loss or damage to property. The participant has voluntarily assumed the risk of such losses and waives any claims for such losses against ADRL, its officials, the event sponsors, the race track operators and other participants and discharges such persons from responsibility for such losses and agrees not to sue such persons for such losses. All participants shall be required as a condition of participation to sign all required entry forms, including such releases as shall be required by ADRL and their insurance policies. For purposes of clarification, the term “participant” shall include any person directly or indirectly associated with any vehicle which has been permitted to enter an event site, including, but not limited to owners, drivers, crew members, guests of participants, spectators or commercial vendors.
Each participant expressly agrees that by entering an ADRL event, the participant will be bound by all of the decisions, rules and regulations of ADRL, including all procedures provided for in the ADRL rules and by the decisions, rules and regulations which are applicable to a particular event, including those of the host track and the host track’s sanctioning body. The participant agrees to be bound by and abide by the decisions of the Competition Director, its designee and all other ADRL officials at all events. The participant also agrees that all decisions made before, during or after an event are final and may not be appealed or made part of, or the basis of, litigation and hereby agrees to release and waive from liability and not to bring any action against the Competition Director, their designees, ADRL, the race track operator, track safety equipment, event sponsors and all other event officials for any loss, damage or injury caused by malfunctioning electronic or mechanical equipment whether caused by negligence or otherwise.
The participant further agrees that any dispute concerning any event, the rules and regulations of ADRL or any decisions rendered by ADRL or ADRL officials, shall be resolved pursuant to the procedures provided for in this rulebook. The participant agrees to indemnify and to hold ADRL harmless for any costs or loss incurred as a result of the failure of the participant to comply with the rules, regulations and procedures provided for herein.


RJS Racing Equipment




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