Rear Gearbox Bearing Inserts, Aluminum 8B/8T 2.0Key Features High durability aluminum allows inserts to be used for the life of the vehicle Hard anodized to improve durability and be resistant against scratching Left and right side inserts key into gearbox to disallow any rotation of the inserts that can cause drivetrain failure Laser etching identification designates inserts for 2. 0 gearboxes only . 1 and . 25mm shims included for differential shimming