AKG Motorsport Motor Mounts, Poly 80A – E36, E46, Z3, Z4Product Description Our BMW E36, E46, Z3, Z4 Polyurethane (80A) Motor Mounts hold the engine in place for improved power transfer through the drivetrain. They feature our innovative, registered interlocking system making them much stiffer than a normal medium durometer mount without compromising comfort. The exclusive, internal interlocking design makes them the only true aftermarket isolating engine mounts available, while also helping to prevent