The factory rear differential bushings on a Subaru Crosstrek develop play over time, letting the diff shift under load and adding noise and vibration you'll feel through the floor. ADF's Rear Differential Lock Out Bushings fill that void with 85a urethane inserts, made in-house in the USA with 304 stainless steel backing washers that keep the insert seated rather than working loose. They fit into the existing OEM bushing housings, so the factory bushings need to stay in place. A worthwhile pairing if you're running a Torq Master locker, since the tighter fit smooths out the ratcheting motion and quiets down cornering noise. Canada-wide shipping from Flat 4 Offroad in Calgary.