Stock Front frame rails (must be in stock location).

Aftermarket control arms and bushings allowed as long as they bolt in stock locations.

Rack and Pinion steering allowed.

Aftermarket strut is allowed but must follow the following guidelines:
            Full on race strut prohibited ( ie. Lamb or equivalent type )
            Bolt in stock location with the exception of aftermarket K-Member
            Strut must be comparable to QA1 or Strange style (adjustable)
            Struts that changes caster and camber are prohibited

Aftermarket Coil shocks allowed

ALL replacement parts must be in stock location

K-Members allowed (late model Mustangs, Camaros and Firebirds)

K-Members must feature stock attachment locations

No part of the K-Member may be permanently attached to the chassis

Rear Frame rails must be in original stock location (minor notching allowed for tire clearance)

Mini Tubs allowed

Any rear suspension allowed, 4-links, ladder bars, etc.

Motor Plate and Mid Plate allowed

Motor must be in stock location

No traction compound spraying devices allowed.

Max 88 MM turbo inlet. Air to liquid intercooler allowed. Measurement will be a 1/16th of an inch away from the compressor wheel. If it measures more that 88 MM or if the leading edge is more than a 1/16th away from the compressor wheel then the turbo is illegal. NOTE: All turbo entries must have measuring tool and demonstrate all measurements are legal, do not show up without it or you will not be allowed to run.

Maximum supercharger F1 air to water.

No big blocks allowed with a turbo or procharger/blower.
 

Firewall must be in stock location, minor modifications for trans, etc is OK.

Floor pan may be patched or repaired with welded in factory replacement panels. May be altered for thru the floor sub-frame connectors, etc.

No body alterations.

Headlights and taillights must be in working condition

Fiberglass limited to Hood, Bumpers, Deck Lid, front fenders or doors, limited to doors or fenders, not both. No one piece fiberglass front ends.

Forward facing hood scoops limited to 6" tall.

Drilling/cutting holes in hood for air inlet prohibited

No Pro Mod style wings

Max Wing 15" from leading edge

Lexan allowed   
 

Two Front seats, turbo/supercharger cars may remove passenger seat for  plumbing. Nitrous cars may remove passenger seat if bottles mounted in area.

Driver Seat must be mounted in front of Door Jamb

Carpeted interior

Door panels (aluminum door panels allowed)

Stock Dash (aftermarket gauges allowed)
 

10.9 Tread width only, NO W's. Hoosier part # 18192D05 will not be allowed. Including MT 28 x 10.5 W.

12.5 sidewall designation DOT Tires max not to exceed 10.9 inches of tread

Only ONE type power adder allowed

Timers and controllers are allowed.

Progressive nitrous controllers and data recorders allowed.

Dual entry plates are allowed 2 nitrous solenoids and 1 fuel solenoid. N20 solenoids must be visibly wired together, not separate, and in a single stage configuration.

Automatic or factory equipped manual.

NO Brunos, Lencos etc.

NO Sheet metal Intakes

Must use mass produced cast aluminum intakes (no tunnel rams)

Single Carburetors only

EFI max 90 MM throttle body. 1250 CFM max 

V6 Turbo may use air to liquid intercooler

F1’s or smaller can have liquid intercoolers

Max 6-71 Blower allowed

All cars must run gasoline (no alcohol or methanol)

Dry Sumps Not allowed

All big block engines limited to 10.2" deck height. BBC 427 tall deck "truck" block allowed.

Billet or custom fabricated heads prohibited.

Internal port areas of cylinder heads may be welded or epoxied for repairing, but heads must maintain standard "as produced" valve/port layout design, valve cant, and valve spacing. (no substituting canted valve for inline head, etc.)

Big Block cylinder heads must be conventional style and retain 24* style port/valve configurations. No BBC 18* heads allowed.

Small Block cylinder heads must be conventional style with a minimum 15 degree valve angle .

All valve angles will be + or - 1 deg.

No Big Chief, Big chief style or SB2 or SB2 style heads.

Porting allowed.

Yates heads will be allowed on nitrous entries, see weight breaks.

Mufflers Required.

No Insert or Collector mufflers.

 All - base 3100#

 Up to 600" – base 3300#

600" and up - base 3400#

10.2" Deck height MAXIMUM

*LSx powered cars - 3200#

*Turbocharged prochared small blocks - 3250# (True 88MM)
*Reduced 88MM 3350#

*Any TRUE 23* headed small block subtract 100#  

*Yates or Yates style heads add 200#

All races will be run on a .400 Pro Tree, Courtesy staging will be in effect.  All cars must stage on their own power. Deep staging is not allowed.

You will be required to go to the scales BEFORE qualifications and then AFTER each elimination run. During qualifying you may be asked to re-scale and if you are light, you will be put at the bottom of the ladder. Do not pass the scales. It WILL lead to disqualification.

Rules of the appropriate sanctioning body will be in effect NHRA and IHRA depending on the host track.

Safety rules of the Host track will be in effect.

Rules published on the TXDRL website are the official rules and are subject to revisions at the discretion of TXDRL. Any revisions will be posted on the TXDRL web site within 3 days of any rule revisions or at least 1 week prior to an event.

All drivers, pit crew and family members will be expected to act in a professional manner. It is the drivers responsibility to ensure that all pit crew members as well as family members adhere to this rule, any violation will result in disqualification and loss of entry fees, if deemed serious enough or it becomes a problem at later races it is up to the discretion of TXDRL to ban the individual from future races.

Rules are subject to change.

A racer may only be an entrant in one class at any given race.

Any rule interpretation is left up to the discretion of TXDRL.

Under no circumstances are you to pull to the line without proper safety gear in place. This means EVERYTHING. Gloves, Helmet, jacket, pants, harnesses, etc. This is for your own safety.

Some non-performance advantage violations may be granted an exception. Any exception must be granted by an TXDRL official prior to qualifying and will be announced at the drivers meeting. Any violations found after the fact will result in disqualification.

Points will be calculated and posted after each race. Please check your points and if an error is found, it must be reported prior to the next schedule race. Points will be locked in the day of the next schedule race and any errors will not be corrected.

All rule violation challenges will be taken seriously.

Each stated violation will require a separate challenge.

A $150 fee will be required for each challenge. If the car being challenged is found to be in violation, they will be disqualified and the fee will be refunded. If the car is within the rules then the fee will be forfeited to the accused.

All challenges will be tech’d by a neutral party in the presence of one of the accused team’s crew member and a TXDRL official.

All challenges must be made within 15 minutes of the end of the round.

If found within the rules, the accused team will receive as much time as needed to prepare for the next round.

Revised - 02/17/2009