E46/Z4 Polyurethane Motor Mount Bushings

The Garagistic E46 & Z4 BMW Polyurethane Motor Mount Bushings serve as a direct replacement for OEM BMW part numbers 22116779970 and 11812283798. These upgraded bushings are available in three material options: 80A polyurethane for a street-oriented feel, 95A polyurethane for track performance, and solid aluminum for ultimate rigidity. Compared to factory fluid-filled mounts, which prioritize comfort and allow excessive engine movement, these polyurethane and aluminum options significantly reduce engine sway. This enhanced stability leads to better power and torque transfer to the drivetrain, improving overall performance. The "captive floating stud" design is a key feature, integrating the mounting studs into the polyurethane during production. This unique construction ensures the studs remain captive yet separate within the bushing, allowing the polyurethane to dampen vibrations rather than transferring them directly through the stud. These motor mount bushings are designed for an OEM-like, drop-in fit for all 6-cylinder M5X/S5X E46 chassis (including 328, 325, M3, 330, 323) and all 6-cylinder Z4 models. The polyurethane variants are more rigid than factory units and will transfer more vibration to the car's chassis, but the benefits of increased performance, durability, and responsiveness are considered to outweigh this drawback by Garagistic. The included studs are upgraded to 12.9 grade zinc-plated for enhanced strength over industry standards. Garagistic offers a lifetime warranty on these bushings.