Chassis

1. Stock front frame rails (must be in stock location)
2. Aftermarket control arms and bushings ok as long as they bolt in stock locations.
3. Rack and Pinion allowed
4. All replacement parts must be in stock location
5. No replacement part may be permanently attached to the chassis
6. K-Members allowed (late model mustangs, Camaro's and Firebirds)
7. K-Members must feature stock attachment locations
8. Bolt in coil-overs allowed in front only, as long as they mount in stock location, no rear coil-overs.
9. Aftermarket bolt in sub frames not allowed. Sub-frame connectors okay.
10. Cross Members may be notched for oil pan clearance
11. Bolt on Traction devices only, no aftermarket 4-links
12. Ladder bars allowed with 100 # weight penalty
    
13. Suspension components must be attached to frame rails
14. Factory or After market type anti-sway bars allowed
15. NO Wheelie bars
16. Engine must be in stock location with stock style mounts, NO MOTOR PLATES
17. No aftermarket wings, only OEM stock spoilers/wings.
18. Rear shocks may be moved for tire clearance
19. Rear shocks must remain stock style
20. No traction compound spraying devices allowed.
21. A single aftermarket torque arm is allowed but not in conjunction with Caltrac or Caltrac type devices. Floaters not allowed on leaf spring cars. Torque arm must not be capable of changing/altering pinion angle. Brackets can be welded in place for mounting.
22. 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

Body

1. Stock Firewall must be in stock location
2. Unaltered floor pan. May be altered for thru the floor sub-frame connectors, etc.
3. NO body alterations (must have front and rear bumpers
4. Headlights, Taillights must be in working order
5. Fiberglass Limited to Hood
6. Forward mounted hood scoops prohibited unless OEM equipped
7. Drilling/cutting holes in hood for air inlet prohibited
8. Mini tubs allowed

Interior
 

1. Two Front Seats
2. Driver's seat must be mounted in front of the door jamb
3. Full Interior (carpet, dash, stock door panels)
4. No Lexan (must have factory glass and windows)
5. Back seat not required, seat area must be carpeted. 

Tires

1. Mickey Thompson 28x11.5x15 ET Street tire or MT ET Street radial 275/60/15
    

Power Adders
 

1. Only one power adder
2. Only one pressurized n2o bottle in car. Push systems are prohibited.
3. Max 76 MM turbo (air to air intercooler) Measurement will be a 1/16th of an inch from the compressor wheel.
4. NO Roots type superchargers
5. N2O limited to a Plate type system with one n2o solenoid, one fuel solenoid and one purge solenoid. Plate can only have one nitrous entry point and one fuel entry point.
6. Purge has to exit engine compartment.
7. All Cars must run Gasoline (no alcohol or methanol)
8. Progressive nitrous controllers and data recorders allowed.
9. Maximum F1R or D1R super charger
    

Engines

1. NO sheet metal intakes
2. Single Carburetors, maximum 4150 series
3. Dry Sumps not allowed
4. EFI 90 MM throttle body limit on nitrous assisted cars. 80 MM limit on turbo cars.  Horizontal throttle body limited to 4150 style with 1000 CFM maximum
5. No aftermarket big block Chevy tall deck, or aftermarket big block Fords allowed
6. Mid plates allowed.
7. LS1 motors must have stock OEM LS1 heads. Carb intakes allowed. See weight section below
   
8. Hybrid cars are allowed with one execption.  LSx engines can only be used in a chassis in which they were available OEM. 
    

Exhaust
 

1. Mufflers Required
2. NO insert or collector type mufflers
3. Mufflers are required to extend past the mid point of the drivers section
    

Weight Breaks

1. *small block turbo - 3200#


2. *Small block base weight 3100#


3. *Up to 440" - 3100#


4. *440" + 3200#

1. *3300# base weight.


2. *up to 530" - 3300#


3. *530"-590" - 3400#


4. *No 18* Oval port BBC heads


5. *No CFE 405's


6. *588 cubic inch MAXIMUM!

Heads
 

1. Billet or fabricated heads prohibited
2. Internal port areas of cylinder heads may be welded or epoxied for repairing, but heads must maintain standard "as produced" valve layout design, valve cant, and valve spacing. (no substituting canted valve for inline head, etc.).
3. Cylinder heads must retain OEM style port/valve configurations and must be a massed produced type head readily available. One-off or custom made cylinder heads prohibited. Must maintain conventional/stock style valve angles.
4. No Big Chief, Big Chief style,18* BBC, SB2 or Yates style heads allowed.
5. No 18* heads allowed except for LS1 stock valve angle heads.
6. Porting allowed.
7. If you are not sure if a particular head is allowed, contact TTT5 for clarification.
8. Click here for approved head list.