DCT Shootout

ET Limit for STREET CLASS ONLY

In order to keep the Pro cars out of the Street class, the ET limit in Street is 9.50 with no breakout.

You can run a 9.49 in qualifying, but the run will not be counted. You must have at least one qualifying pass of 9.50 or slower to qualify.

During eliminations, if both cars run quicker than 9.50, the slower of the two ETs will win. For example, a 9.49 will beat a 9.44.

Class Designation:

Street Class will qualify and be laddered based on elapsed time closest to the 9.50 index recorded during qualifying sessions. All qualifiers must have a valid elapsed time recorded to be placed into eliminator competition. You must have one pass in qualifying of 9.50 or slower to qualify.

Pro Class will qualify and be laddered based on elapsed time.

Minimum Weight
No minimum weight.

Eligible Vehicles
2020–2022 Ford Mustang Shelby GT500 and Chevrolet C8 Corvette models are permitted.

Vehicles must retain an eligible TREMEC DCT transmission as specified below.

Engine
GT500: Engine must be a Ford Predator 5.2L as found in the 2020–2022 GT500.
C8 Corvette: GM/Chevrolet production-based V8 engine from the C8 Corvette engine family permitted.

Internal modifications are permitted.

Engine combinations must remain within their respective manufacturer. Ford engines are permitted in GT500 entries and GM/Chevrolet engines are permitted in C8 entries.

Transmission
TREMEC dual-clutch transmissions are the only permitted transmissions.

GT500 entries may use the TREMEC 7-speed DCT.

C8 Corvette entries may use the TREMEC 8-speed DCT.

Internal transmission modifications and aftermarket transmission controllers are permitted.

Conventional automatic, torque-converter, manual and non-DCT transmissions are prohibited.

Cooling System
Any cooling system permitted. In-cab intercooler tanks permitted along with under-hood and trunk-mounted tanks.

For C8 Corvettes, cooling tanks and systems may also be located in OEM or appropriate vehicle-specific locations.

Exhaust
Any header size/tubing permitted. Open headers and downpipes permitted. Bumper/fender exit permitted.

Fuel Delivery System
Any fuel system permitted and fuel location permitted, subject to applicable NHRA safety requirements.

Fuel
All fuels permitted.

Turbochargers
Permitted.

Superchargers
Permitted.

Nitrous
Permitted.

Oiling System
Wet and dry oiling systems permitted.

Intake Manifold
Aftermarket intake manifolds permitted.

Air intake coolers and/or ice boxes permitted in the passenger compartment. Trunk-mounted or other vehicle-appropriate ice tanks permitted.

Rear End / Transaxle
GT500: OEM or bolt-in 8.8 or 9-inch rear end permitted.

C8 Corvette: OEM-style rear transaxle/differential configuration required. Upgraded axles, differential components and related drivetrain components permitted.

K-Members
Aftermarket K-members or subframes permitted but must attach to the chassis using original factory mounting locations.

Motor plates permitted where applicable.

K-members, subframes and cradles may be modified as necessary for oil-pan, engine, transmission, exhaust or component clearance.

For C8 Corvettes, the OEM-style front and rear subframe/cradle architecture may be retained or modified using aftermarket direct-replacement components.

Control Arms
OEM or aftermarket tubular/direct-replacement control arms permitted and must attach at the stock chassis mounting locations unless otherwise permitted under the Suspension rules.

Shocks/Struts/Springs
OEM or aftermarket shocks/struts/springs permitted. Coilovers permitted.

Suspension
Stock-type suspension may utilize aftermarket direct-replacement suspension components including shocks, struts, springs, coilovers and/or control arms.

GT500: Stock-type 3-link and 4-link suspensions must maintain stock lateral angles and chassis attachment points but may be moved up or down on the rear axle. Aftermarket torque arms permitted. Stock-type, ladder-bar and racing 4-link rear suspension systems are permitted in Pro Class only.

C8 Corvette: OEM-style independent rear suspension architecture must be retained. Aftermarket direct-replacement control arms, links, shocks, springs, coilovers and related suspension components are permitted. OEM chassis/subframe suspension mounting locations must be retained.

Panhard Bars
Permitted where applicable.

Torque Arms
Permitted where applicable.

Wishbone
Permitted where applicable.

Minitubs
Permitted where applicable.

Wheelie Bars
Prohibited.

Chassis
All cars must retain the complete OEM production-based chassis structure, floorboard, firewall/bulkhead and primary frame/unibody structure.

GT500: Frame rails may be modified in front of the strut tower. Notching of the chassis for clearance is permitted. Spare-tire wheel well may be removed and covered with sheet metal.

C8 Corvette: OEM mid-engine chassis architecture and passenger-compartment/engine-compartment bulkhead must be retained. Localized modifications for component, drivetrain, exhaust or tire clearance are permitted provided they comply with applicable NHRA safety requirements.

Tires & Wheels
28/29-inch tires are permitted.

C8 Corvettes may use equivalent vehicle-appropriate tire diameters necessary for the OEM-style independent rear suspension and transaxle configuration.

Wheels
Aftermarket wheels permitted.

Spindle-mount wheels permitted where applicable.

Body
OEM steel, aluminum, fiberglass or composite production body shell, as applicable to the vehicle, required.

Aftermarket body parts are permitted as long as the vehicle remains factory appearing and are limited to hoods, front bumper covers, fenders, doors, rear deck lids/hatches and equivalent vehicle-specific panels.

Firewall
GT500: Stock firewall required.
C8 Corvette: Stock passenger-compartment/engine-compartment bulkhead required.

Electronics
Trans brake, 2-step and aftermarket ECU permitted.

Aftermarket transmission controllers permitted.

OEM or aftermarket launch control permitted.

Lights
Headlights and brake lights are required. One headlight may be removed for induction where applicable.

Windows
Lexan/Optic Armor or OEM permitted.