Motorsport Body & Aero

Bonnet pins

They are mandatory once the factory catch is removed, and they are a good idea on any track car anyway. The flush versions fit with a cutout in the bonnet; the external ones clamp over it, simpler and more reversible.

Tow straps

An FIA homologated strap is required at scrutineering and has to be visible and reachable from outside, with the attachment point marked. A strap without homologation may well hold, but at scrutineering that does not count.

Polycarbonate windows

Sliders provide the partial opening that many regulations require, so you can talk to a marshal and let air into the cabin. They fit with a cutout, so they are planned before the window is cut.

Small things, but on the list

Badges, stickers and cabin vents complete the list. They do not cost much, but they are the kind of thing that turns out to be missing on the morning of scrutineering.