Engine
Engine must be original equipment or aftermarket direct replacement equipment.

Engine block must be original equipment or aftermarket direct replacement block.

Cylinder heads and intake manifold must be original equipment or aftermarket direct replacement.

Engine displacement is limited to 520 cid at the weight of 3300 lbs.

Engine displacement over 520 cid will require a 200 lbs weight penalty of 3500 lbs for car and driver.

Cylinder Heads
This class requires original equipment cylinder heads or aftermarket heads that are commercially available as a direct replacement for production heads. Cylinder heads are restricted to production based port location of original equipment heads. Cylinder head modifications are permitted.

Racing cylinder heads with a different port location or port layout from the original equipment heads are not allowed.

Intake Manifold
Factory production original equipment intake manifold is allowed.

Direct replacement commercially available cast 4 barrel intake manifold is allowed.

Single throttle body EFI manifold is allowed.

The intake manifold must be able to directly bolt on to production cylinder heads in order to be legal for this class. Tunnel ram and sheet metal intake manifolds are not allowed.

Power Adders
Nitrous Oxide Injection, Turbo chargers and Superchargers are permitted.
Engine power adder is limited to a single power adder.

The use of 2 or more power adders is not permitted (Ex. turbo and nitrous are not allowed). 

Exhaust System
All exhaust system gases emitted from the engine must pass through the mufflers. Exhaust pipe size limited to a maximum 4 inch diameter.

Tires
All 4 tires must be D.O.T. approved radials or belted tires.

Maximum rear tire tread width limited to 11.50 inches.
Drag racing slicks are not allowed.

Transmission
Transmissions are limited to original equipment units available in production vehicles.

Original Equipment transmissions can be upgraded with aftermarket components.  

Aftermarket purpose built race transmissions require a 200 lbs weight penalty of 3500 lbs.

Chassis/Suspension
Front frame rails must remain in the stock location.

Tubular cross members permitted. Back-halved combinations permitted.

If stock frame is notched, it must be reinforced in a manner acceptable to NHRA/IHRA.

Any strengthening members may be added to a stock frame.

Front Suspension - Aftermarket direct-replacement components are allowed as long as stock mounting points are maintained on components and frame.

Rear Suspension - Aftermarket 4 link suspension system or ladder bar suspension system is allowed. Wheelie bars are not allowed.

Weight
The minimum weight for car and driver is 3300 lbs.

Engine Displacement over 520 cid requires weight of 3500 lbs.

Engine Displacement over 520 cid and aftermarket race transmission must weight 3600 lbs. 

Safety Equipment
All race cars entering competition must have the required NHRA safety equipment.  All racers competing in professional categories must have a valid NHRA license.  All racers must present valid competition licenses at tech.  Licensing will not be available during this race.

The USCN reserves the right to amend rules to provide a better and more competitive race.  Penalties may be imposed for rule infractions that do not represent the intent of the class. Please contact USCN Tech at 586 557 4552 for clarification regarding race rules