MMX Performance G8X M2 / M3 / M4 Rear Differential OEM Bushing Aluminum Insert Kit - For OEM Single Rear Mount

The MMX Performance Rear Differential OEM Bushing Aluminum Insert Kit (MMR55-1618) is engineered for the BMW G87 M2, G80 M3 Sedan, G81 M3 Touring, G82 M4 Coupe, and G83 M4 Convertible, including applicable rear-wheel-drive and xDrive configurations.

The factory rubber differential bushings are designed to isolate drivetrain vibration while allowing a degree of movement under load. During hard acceleration, launches, and rapid changes in drivetrain torque, this movement can reduce the precision of the connection between the differential and chassis.

MMX addresses this with precision-machined aluminum inserts that fill the existing voids in the factory rubber bushings, limiting differential movement without requiring complete bushing replacement.

CNC-machined from 6061-T6 billet aluminum, the kit includes four front inserts and one rear insert for the factory single rear differential mount configuration. The installation is fully reversible.

Product Details

• Vehicle-Specific Fitment: BMW G87 M2, G80/G81 M3, and G82/G83 M4, including rear-wheel-drive and xDrive models.
• Factory Bushing Retention: Aluminum inserts fit into the existing OEM rubber differential bushings.
• Reduced Differential Movement: Limits differential movement during launches, hard acceleration, and dynamic loading.
• 6061-T6 Billet Aluminum Construction.
• Five-Piece Insert Kit: Includes four front inserts and one rear insert.
• Single Rear Mount Configuration: For vehicles retaining the factory single rear differential mount.
• Factory NVH Isolation: Retains the OEM rubber bushings.
• Fully Reversible.

Compatibility Note: When upgrading to the MMX dual rear mount configuration, the MMX Dual Differential Mount and the single insert for the dual rear mount are needed alongside this kit to complete the conversion.