M2 M3 M4 POWERFLEX DUAL-MOUNT DIFFERENTIAL BRACKET PFR5-4030 PACKAGE
Despite having the provision for two mounting bushes on the factory tubular subframe, BMW opts to use only a single offset bush to mount the diff bracket to the subframe. This essentially creates a pivot point for the diff under torque loading, especially if the 4x front diff bushes are worn and softened.
With hard launch starts and sudden and frequent on-off throttle changes, this puts the single rear OE rubber bush through extreme torsional and directional forces, resulting in accelerated ageing with failure often seen at around the 30-40,000 mile mark and an unsettled and potentially clunky rear-end.
PFR5-4030 Dual Mount Diff Bracket is made from our in-house CNC machined 6082 High-Tensile Aluminium and is designed to utilise the secondary mounting position on the OE subframe. With the addition of a second bush, this prevents the diff from twisting under load, providing benefits such as:
- Reduced drivetrain movement
- Improved throttle response
- A more controlled and consistent on-off throttle chassis response.
- Improved tyre-to-road power transfer reducing wheel hop
- Reduced strain on fitted bushes
Our package also contains either a purple or black replacement bush that features a built-in support washer, providing further stability of the diff under acceleration.
To Fit:
M2 F87
M3 F80
M4 F82 F83