SuperStock 4

Any fabricated body allowed.

Rear wheel drive cars only.

Boxed in interiors permitted.

Rear firewall must be covered with sheet metal to separate driver from fuel cell.

Front and rear chassis rails must be stock.

You may tie uni-body together, no bracing under car.

All cars must maintain stock wheelbase.

Entire floor pan and firewall must be in one piece. FLOOR PAN MUST NOT BE CUT.

Cars must weigh 1 lb. per cc. with driver after race. 2000 pound min. 2400 max.

Weight decal mandatory on upper right hand fender.

Windshield optional. If removed you must have three bars on driver side.

Engine must be in stock location.

Engine may be balanced. NO stroking or destroking.

Stock head and intake.  No port and polishing. May bore intake straight down for clearance, no radius or blending. May use fuel injection parts.

No dual plug heads. One spark plug and two valves per cylinder. Stock size valves only. Double valve springs permitted.

Cutting lifter boss permitted.

Lash caps permitted.

Any after market timing gear allowed, roller cams and rockers permitted.

Any cam .500” lift max.

Stock stroke crankshaft or after-market (after-market crank must be equal weight to stock crankshaft) stock length rods only (may use after-market stock look alike rods - MUST BE STOCK LENGTH) No knife cutting or lightening of any kind to the crankshaft.

Any flat top piston, after market permitted. 3-ring piston only. Toyota may run factory dome pistions(max height .267").

Stock clutch, pressure plate and flywheel.  Flywheel must weigh 16 pounds with bolt. 

Holley 500 cfm (4412) mandatory, must pass track tool. No modification except choke flap.

Maximum 3” spacer. Plus .100” for gaskets. Electric fuel pump permitted.

Must run stock distributor. MSD ignition parts allowed.

Transmission and differential must be stock manufactured and interchangeable. Lock rear-end optional. Transmission must have all forward and reverse working gears. All cars must have scatter shield and / or approved bell housings. (Technical inspection required)

Shackles permitted on rear spring. Lowering blocks allowed. Shims allowed on rear coil springs and rear.

May run screw jacks, wedge bolts, or adjuster cups.

Strut cars must run stock or OEM replacement components, may brace top of tower. May alter the top of the strut tower with a slotted plate for the purpose of setting caster / camber.  Shocks must be in stock location.

Stock front and rear sway bars only. No adding of additional devices. No adjuster allowed.

13” H x 10” W rims: no wheel flares to extend beyond two inches of outer wheel.

Stock type brakes for make of car, any pedals and master cylinders. 

No adjustments within reach of driver.

Racing fuel only.