1. Front hoods, engine covers, trunk lids and hatches not containing glass, front fenders, rear fenders not part of chassis structure (unibody), front and rear bodywork, and side skirts may be replaced with factory parts or exact duplicates in order to facilitate allowed modifications. This does not permit adding components with additional vents or ducting for airflow.

2. Vehicles with removable hardtops may use an exact replica hard top including one made of alternate materials. Replacement pieces must be able to use OE hinges and latching mechanisms as standard. Rear glass in such hardtops may be of automotive safety glass or polycarbonate material.

3. Factory rub strips may be removed.

4. OE “pop-up” headlights may be replaced with static headlights, provided the replacement units are intended for automobile use on public roads as a primary means of illumination, and retain high and low beams as originally provided by the manufacturer. Minor repositioning of the headlights can accommodate the alternate headlight, but the unit may not be relocated, and the repositioning may serve no other purpose. All associated hardware may be removed, replaced or modified.

5. Fenders may be rolled but not flared, but no material may be added or removed, pinch-welds may not be expanded, nor may the general shape and contour of the fender be modified.

6. Commercially available bodywork cladding, molding, trim, accessories, lights and other appearance modifications including flexible “chin lips,” which have little or no effect on performance and/or handling and do not materially reduce the weight of the car are permitted. The addition of small holes for attachment hardware for cosmetic modifications is implicit (e.g., holes for fasteners to mount side skirts).

This allowance – seemingly grey for any SCCA traditionalists – is to encompass exactly what it says. Cosmetic items. This is intended to allow mass-produced aftermarket items which resemble what a factory accessory catalog or auto-parts store accessory isle might have. Meaning, this allowance is for items which may look like performance parts but do not change anything which could affect warranties by increasing stress/improving performance.