




Rear Diff/Carrier Wedgelock System | Subaru WRX & STI (2015-2021)
Kartboy's solution for the new rear subframe and rear differential lockdown 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.
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Rear Diff/Carrier Wedgelock System | Subaru WRX & STI (2015-2021)

Built by Die-Hards, Trusted by Legends
For over 25 years, Kartboy has supplied performance drivetrain and suspension components trusted by Subaru owners - from street builds to some of the most capable drivers in the sport.