Kartboy's solution for the new rear subframe and rear differential lock down system. Machined aluminum insert to lock in the rear diff bushing inserts. Four Carrier inserts to keep everyone happy. Stealth black so the AutoX protesters will never know. Install with hand tools in under an hour.
This Part Fits
2015-2017 Subaru STI Kartboy Rear Diff / Carrier Wedge Lock System
2015-2017 Subaru WRX Kartboy Rear Diff / Carrier Wedge Lock System