Description
Powerflex Dual-Mount Rear Differential Bracket – F82, F83 4 Series M4 – PFR5-4030
PRODUCT NOTES: Supplied complete with M14 bolt, thread locker, and Powerflex keyring With the newerF8xM2/M3/M4’s making big power and having superb chassis straight from the showroom, it’s no wonder they’re often found at the most serious of track-days or at tuning shops across the globe. Unfortunately, the power that makes these cars so fun to drive eventually has an impact on the vehicle components, most notably the rear differential bushes. 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 aging with failure often seen at around the 30-40,000 mile mark and an unsettled and potentially clunky rear-end. We are proud to release a high-performance solution to this problem, giving you the tools to re-establish rear-end stability on yourF8xM2/M3/M4.PFR5-4030 Dual Mount Diff Brack etis made from our in-house CNC machined6082 High-Tensile Aluminium and is designed to utilize the secondary mounting position on the OE subframe. The addition of a second bush prevents the diff from twisting under load, providing benefits such as Reduced drivetrain movement improved throttle response more controlled and consistent on-off throttle chassis response. Improved tire-to-road power transfer reducing wheel hopReduced strain on fitted bushes corrosion-resistant satin Black Anodised Aluminium Brackets optimized for high stress and deflection whilst withstanding high torque loads but is designed to function equally on standard or modified vehicles with either a single OE bush or dual aftermarket bushes. Although the bracket can be fitted without the need to remove the subframe from the vehicle completely, we would naturally recommend combiningPowerflexproducts by using our already hugely popular 80A durometerPFR5-4026Rear Diff Mounting Bush for both subframe rear mounting positions with the addition of ourPFR5-4025Rear Diff Front Mounting Bushes for the front for the ultimate in differential control and a lasting fast-road or track solution.
BUSH SIZE IF APPLICABLE:
NUMBER OF BUSHES IN PACK:1
REPLACES OEM BUSH PART NUMBERS:33172284775/
Road Series
For Road and fast Road use
POWERFLEX Road Series bushes improve your cars road holding and chassis performance
Vehicle Fitment
| MAKE | MODEL | YEAR | ENGINE |
|---|---|---|---|
| MAKE | MODEL | YEAR | ENGINE |
| Bmw | 4 Series F3X |