1. Sport Category - Interior

You can add stuff like gauges, pedal covers, shift knobs and things that don’t make the car any lighter and have little to no effect on performance. You can also replace the driver and passenger seats, if they are full size seats and are upholstered. If your steering wheel doesn’t have an airbag, you can change that, and you can add a short-shift kit, if it only changes the shifter bushings and/or the main part of the shifter. Of course, we’re good with data acquisition systems and cameras, and things like spare tires, jacks and tool kits can be removed.

There is also a “safety loophole." If you add a roll bar meeting Safety Level 2 Standards, you can remove carpet and trim (convertible tops included) from behind the driver and passenger seats and even replace an airbag-equipped steering wheel. If you install a full cage meeting Safety Level 3 Standards, you can remove all the trim and carpet other than the dash.

Sport Category Interior - Full Rules

1. Accessories, gauges, indicators, lights and other appearance, comfort and convenience modifications including pedal cover kits, alternate shift knobs and paddles which have little or no effect on performance and/or handling and do not materially reduce the weight of the car are permitted. Delayed shutdown devices such as a “turbo timer,” which perform no function while the car is in motion, are permitted. This does permit the installation of an additional mirror (e.g., Wink®). The addition of small holes for attachment hardware for cosmetic modifications is implicit (e.g., holes for fasteners to mount additional gauges).

2. The driver and front passenger seats may be replaced with the following restrictions.

A. The seating surface must be fully upholstered.

B. The top of the seat, or an attached headrest, may not be below the center of the driver’s head.

C. The seat shall be securely mounted, so as to provide fore/aft and lateral support.

D. Passenger seat must be either OE or match the requirements for the driver’s seat.

3. Alternate steering wheels are allowed, provided the outside diameter is not changed by more than 1-inch from the standard size. Steering wheels with an integral airbag may not be changed unless Safety Levels 2 or 3 Standards are met.

4. Short shift kits which only change the length of the shift rod attached to the gear shift knob may be installed. Kits which change other linkage, mounting brackets and/or tension through springs are expressly disallowed.

5. A hole may be added to interior body panels, the engine compartment, the trunk, and/or a strut bar to provide access to the adjustment mechanism on a shock absorber. The hole may serve no other purpose and may not be added through the exterior body panels.

6. Any item that cannot be held permanently in place by factory-installed fasteners may be removed.

7. Spare tires, tools and jacks may be removed. Any fastening hardware and/or other pieces that can no longer be firmly secured in the absence of the spare tire may be removed, if necessary, to ensure compliance with safety inspection requirements.

8. Data acquisition systems (including video cameras) and the accompanying sensors are allowed but may serve no other purpose during a run than real-time display and data recording.

9. With the addition of Safety equipment, the following allowances apply:

A. If the vehicle is equipped with at least a 4-point roll bar, driver’s seat, and restraints meeting SCCA Time Trials Safety Level 2 Standards:

1. Rear seats carpet and trim behind the seats may be removed.

2. Sunroofs, moonroofs, and similar roof-mounted panel cartridges may be replaced by an alternate solid panel serving no other purpose. Attachment is unrestricted but must be secure.

3. Airbags may be removed.

4. Airbag-equipped steering wheels may be replaced or have the airbag removed.

5. Convertible soft tops and related structure and brackets may be removed.

B. If the vehicle is equipped with a minimum 6-point roll cage, driver’s seat and restraints meeting SCCA Time Trials Safety Level 3 Standards, all interior carpet, trim and passenger seats other than the factory dash may be removed.