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There are two different classes that offer performance enthusiasts a wide range of racing opportunities from the mild to the wild.

Supreme Street - unlimited street car performance
Ultra Street - unlimited street/strip car performance


Supreme Street Class Rules
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 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
Power adders are not allowed in the Supreme Street class.
The use of Nitrous Oxide Injection, Turbo chargers and Superchargers is not permitted.

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
Stock suspension is required for the Supreme Street Class.
Aftermarket direct-replacement suspension components are allowed.
Bolt on traction equipment 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.


Ultra Street Class
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.


The Pump Gas Challenge reserves the right to change rules where deemed necessary to provide a more competitive race series.


Ned Erkman - President of the Pump Gas Challenge Drag Race Series
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