MMX Performance G8X M2 / M3 / M4 Rear Differential Raised Poly Bush

The MMX Performance Rear Differential Raised Poly Bush is a two-position differential mounting bush engineered for the BMW G87 M2, G80 / G81 M3, and G82 / G83 M4. Developed as a direct replacement for the factory rear differential mounting bush, the MMX design can be installed at either the factory differential height or in a +10mm raised position, allowing the same component to support both standard-height and lowered G8X applications. At the OEM-height position, the polyurethane bush creates a more controlled connection between the rear differential and chassis, reducing unwanted differential movement under acceleration and changing drivetrain loads. For lowered vehicles, positioning the center section at +10mm raises the rear differential mounting point to help restore driveshaft geometry altered by the reduced ride height. This reduces operating angle, heat buildup, and premature wear on the axle shafts and CV joints. The raised bush is designed as part of the complete MMX Performance G8X differential mounting system. It can be paired with the MMX Front Differential Lift Mount / Cradle (MMR55-1604) for a 3-point configuration, or used with a second rear bush and the MMX Dual Differential Mount (MMR55-1606) to create a full 4-point differential mounting system. Product Details Two-position design with OEM-height and +10mm raised settings Direct replacement for the factory rear differential mounting bush Polyurethane construction provides increased differential control Reduces unwanted drivetrain movement under load +10mm position helps correct driveshaft geometry on lowered vehicles Helps reduce heat buildup and premature axle shaft and CV joint wear Designed for minimal increase in NVH Suitable for road and track applications Installs into the existing rear differential mounting location without modification Compatible with OEM and aftermarket axle shafts Designed to integrate with MMX 3-point and 4-point differential mounting configurations Available Configurations This listing is available with either one or two MMX Rear Differential Raised Poly Bushes. Select the required quantity from the product options based on your differential mounting configuration. 1x Bush: For use at the factory rear differential mounting point and as part of the MMX 3-point differential mounting configuration. 2x Bush Kit: Includes two matching bushes for use with the MMX Dual Differential Mount (MMR55-1606) as part of the complete 4-point differential mounting configuration. Each MMR55-1605 bush features the same two-position center section and can be configured at either OEM differential height or +10mm raised height during installation. 3-Point Differential Mounting Configuration The MMX 3-point configuration uses the height-adjustable front differential cradle together with one MMR55-1605 rear polyurethane bush. Configure both the front cradle and rear bush at the same OEM or +10mm raised position. 1 x MMX Front Differential Lift Mount / Cradle (MMR55-1604) 1 x MMX Rear Differential Raised Poly Bush (MMR55-1605) 4-Point Differential Mounting Configuration The MMX 4-point configuration uses two MMR55-1605 rear polyurethane bushes together with the MMX Dual Differential Mount. The second bush occupies the additional rear mounting location left unused by the factory. Configure the complete system at the same OEM or +10mm raised position. 1 x MMX Front Differential Lift Mount / Cradle (MMR55-1604) 2 x MMX Rear Differential Raised Poly Bushes (MMR55-1605) 1 x MMX Dual Differential Mount (MMR55-1606) Installation The MMX Rear Differential Raised Poly Bush replaces the existing factory bush at the rear differential mounting point and installs into the factory mounting location without modification. The two-position center section allows the installer to select either the factory differential height or +10mm raised position during installation. For the 4-point configuration, select the 2x Bush Kit from the product options. The second bush installs into the additional rear mounting location left unused by the factory and works with the MMX Dual Differential Mount (MMR55-1606). Related Products MMX Performance G8X Rear Differential Front Cradle / Height Adjustable Mount Set MMX Performance G8X M2 / M3 / M4 Dual Differential Mount MMX Performance G8X M2 / M3 / M4 Billet High-Capacity Differential Oil Pan MMX Performance G8X M2 / M3 / M4 Rear Differential Output Shaft Heat Shield Set