MMX Aluminum Insert Kit for OEM Rear Diff Bushing (Single Mount) - BMW G8X

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. The result is a more controlled differential mounting arrangement while retaining the factory rubber bushings.

Fits: BMW S58: M3 (G80/G81), M4 (G82/G83), M2 (G87). Confirm your exact car with us before ordering.

Brand: MMX · Part #: MMR55-1618

• Ships from the brand or distributor, usually in 3–7 business days.
• Free US shipping on orders over $250.
• Unused parts can be returned within 30 days. Some items are marked no-refund in their description.

Full details are on our shipping and returns page.