Spoilers/splitters and cosmetic trim pieces are permitted. Side skirts
may not be used. Spoilers/splitters must comply with the following
subsections. The intent of this allowance is to accommodate commonly
available appearance kits, and replicas thereof, which have
no significant aerodynamic function at Solo speeds.
1. A spoiler/splitter may be added to the front of the car below the
bumper. It may not extend rearward beyond the front most part
of the front wheel well openings, and may not block normal grille
or other openings, or obstruct lights. Splitters may not protrude
15. Street Prepared Category — 95
beyond the bumper. Openings may not be used for the purpose
of ducting air to the radiator or oil cooler, but they may allow air
to flow through a permitted oil cooler provided no ducting is used.
The spoiler may not function as a wing.
2. A spoiler may be added to the rear of the car provided it complies
with either of the following:
a) It is a production rear spoiler which is standard or optional
equipment of a U.S. model of the vehicle, or an exact replica in
an alternate material.
b) It is a non-production rear spoiler which is mounted to the rearmost
portion of the rear hatch, deck, or trunk lid. The spoiler
may extend no more than 10 inches from the original bodywork
in any direction. Alternatively, in a hatchback, the spoiler may
be mounted to the rear hatch lid at or near the top of the hatch;
in such a configuration the spoiler may extend no more than 4
inches from the original bodywork in any direction. The spoiler
may be no wider than the bodywork, and it shall not protrude
beyond the overall perimeter of the bodywork as viewed from
above. The use of endplates is prohibited. Angle of attack is
free. The spoiler may not function as a wing.