Kartboy Rear Differential Carrier Wedgelock Kit Subaru WRX / STI 2015-2021

The Kartboy Rear Differential Carrier Wedge Lock Systrem has been designed to provide more reinforcement to the rear differential which adds a better feel, and more stability to the rear differntial under harsh driving conditions. This kit includes 4 machined aluminum inserts to lock in the rear differential bushing inserts, as well as 4 Carrier inserts, all in a black finish.