Every launch, hard corner exit and upshift in a G80 M3, G82 M4 or G87 M2 tries to move the rear differential, and the factory rubber mounts let it. The MMX Performance 3-Point Differential Lift Kit replaces them with a billet aluminum front cradle and a polyurethane rear bush, so the differential stays put and the rear of the car answers the throttle with less slack.
It also solves a problem every lowered G8X lives with. Drop the car and the rear driveshafts run at a steeper angle, which adds heat and wear at the CV joints. Set the kit to its raised position during install and it lifts the differential 10mm to bring that geometry back. Run it the standard way and it holds the differential at factory height.
How the 3-Point Differential Lift Kit Works
The MMX front differential cradle (MMR55-1604) is machined from 6061-T6 billet aluminum and replaces the factory front differential mount. The MMX raised rear differential bush (MMR55-1605) uses 80A durometer polyurethane with a two-position center that sets either factory height or +10mm. Both drop into the factory mounting points with no cutting or drilling, and the increase in NVH is minimal, so the car stays easy to live with on the street.
Want more support later? The MMX 4-Point Differential Lift Kit adds the dual differential mount and a second bush, and the MMX Ultimate Track Differential Kit adds a high-capacity baffled sump and output shaft heat shields on top of that.
What's Included
- 1 x MMX front differential lift mount / cradle (MMR55-1604)
- 1 x MMX rear differential raised poly bush (MMR55-1605)
Key Features
- Billet 6061-T6 aluminum front cradle replaces the rubber-isolated factory mount
- 80A durometer polyurethane rear bush for a firmer, more controlled connection
- Installs at factory differential height or raised +10mm
- Raised position corrects driveshaft angles on lowered cars, reducing heat and wear on OEM or aftermarket axle shafts
- Direct fit at the factory mounting points, no modification required
- Minimal increase in NVH, suited to street and track use
- Fits RWD and xDrive models
- Part number: MMR55-0001
Vehicle Fitment
Fits the following S58-powered models, RWD and xDrive:
- BMW G80 M3 Sedan (2021-2026)
- BMW G82 M4 Coupe (2021-2026)
- BMW G83 M4 Convertible (2022-2026)
- BMW G87 M2 (2023-2026)
- BMW G81 M3 Touring (2023-2026, not sold in the US)
Installation Notes
Professional installation is recommended. The differential has to be supported while the factory mounts come out, and the cradle and rear bush must be set to the same height position.
- Raise the car and support the rear differential.
- Remove the factory front differential mount and rear differential bush.
- Choose factory height or +10mm and set the cradle and rear bush to the same position.
- Install the MMX cradle and bush in the factory mounting locations and torque the hardware to BMW specification.
