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Kartboy Rear Differential/Carrier Wedgelock System for 2015–2021 Subaru WRX and WRX STI. This carrier wedgelock upgrades the differential mounting to secure the carrier and help maintain alignment under load. It’s intended as a direct replacement or upgrade to reduce unwanted movement of the rear differential assembly on supported WRX and WRX STI models.
Kartboy 15-21 Subaru WRX/WRX STi Rear Differential/Carrier Wedgelock System
