stiffi

Perrin STi Black Plastic Wing Support

Add the PERRIN Performance STi Wing Stiffi to your ride and eradicate that wing from bouncing forever. Our Wing Stiffi fits perfectly between the upper and lower wing to create a support for the center of the wing. Add a up to 5 sets for a ...

Perrin PSP-BRK-400 Master Cylinder Braces

Built for the (02-07) Subaru WRX... The Perrin performance brake master cylinder Stiffi solves a long-time Subaru braking issue: flexing of the thin firewall metal mounting of the master cylinder under hard braking. Built from 6061 Aluminum...

Perrin Subaru Silver Battery Tie Down

*TIE DOWN* The PERRIN Battery Tie Down STIFFI is a quick and affordable upgrade. Keep your battery from moving in all situations. *CONSTRUCTION* The PERRIN Performance Battery Tie Down is machined from billet aluminum with radiused edges an...