Manual Polyurethane Poly Transmission Mounts Bushings 80A For BMW E30 E36 E46 E82 E88 E90 E92 E93 Z3 Z4. Type: Polyurethane Transmission Mounts Bushings Sets. NVH(Noise, Vibration,Harshness) Increase: High (Uprated gearbox mounts will increase vibrations felt through the cabin).