AKG Motorsport - BMW Differential Bushing, Poly 75D - E30, E36 318ti, Z3This BMW E30, E36 318ti, Z3 Polyurethane (75D) Differential (Diff) Mount Bushing eliminates virtually all differential movement for effective power transfer to the rear wheels. The stock rubber diff bushing deflects as torque moves through the drivetrain, which allows the differential to move. Eliminate virtually all of this movement and allow your diff to operate effectively with our BMW E30, E36 318ti, Z3 poly 75D differential bushing. This
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