Rear differential bushings on a Subaru Outback wear and compress over time, leaving play that shows up as extra noise and shift under load. ADF's Rear Differential Lock Out Bushings correct that with 85a urethane inserts, made in-house in the USA with 304 stainless steel backing washers to keep the insert from walking out over time. They fit into the existing OEM bushing housings rather than replacing them outright. Especially useful alongside a Torq Master locker, where the tighter fit smooths the ratcheting rotation and reduces cornering noise. Not compatible with the solid bushing design used on 2013-2014 Outback models. Canada-wide shipping from Flat 4 Offroad in Calgary.