E46 (M3), Z4 (M) Diff Bushings - Poly BMW Z4 E21 320i Delrin Alternator Bushings

E21 320i Delrin Alternator Bushings replace the dinky stock rubber alternator bushings

Set of four Genuine BMW reinforcement plates

bolt-through poly (75D) BMW E30 mounts eliminate virtually all engine and transmission movement for effective power transfer through the drivetrain to the wheels

Z4 rear trailing arm bushing limiters are perfect for those with street cars

E46 (M3), Z4 (M) Diff Bushings - Poly BMW Z4 E21 320i Delrin Alternator BushingsReplacing your old, worn out diff bushings with our poly BMW E46 M3, Z4M diff bushings will substantially reduce differential movement (deflection) for noticeably improved performance and power transfer to the wheels. Depending on which hardness option you choose, you can achieve anything from a track or drift capable street build to the performance of a purpose built race car. The ability of your E46 M3, Z4M to transmit power to the wheels is