Tuning Force Limited - Authorised Powerflex Distributor
Rear Diff Rear Mount Bushes inc Dual-Mount Bracket for BMW F80 M3 F82 F83 M4
This kit includes the:
Rear Diff Rear Mounting Bush PFR5-4026 (Diagram reference 22) x 2 packs (1 bush per pack)
Is a replacement bush that features a built-in support washer, providing further stability of the diff under acceleration.
OEM Part Number: 33177852495
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Dual-Mount Rear Differential Bracket PFR5-4030 (Diagram reference 30)
Supplied complete with M14 bolt, thread locker and Powerflex keyring
OEM Part Number: 33172284775
With the newer F8x M2/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 ageing 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 your F8x M2/M3/M4.
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
The corrosion-resistant Satin Black Anodised Aluminium Bracket is optimised 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 combining Powerflex products by using our already hugely popular 80A durometer PFR5-4026 Rear Diff Mounting Bush for both subframe rear mounting positions with the addition of our PFR5-4025 Rear Diff Front Mounting Bushes for the front for the ultimate in differential control and a lasting fast-road or track solution.
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Kit Fits:
BMW F87 M2 Coupe (2015 - 2021)
BMW F80 M3 (2014 - 2018)
BMW F82, F83 M4 (2014 - 2020)
Prices quoted cover delivery costs within mainland UK and exclude UK Highlands, UK Islands, Northern Ireland and Isle of Man. For these areas and any other destinations not covered, please contact us for a delivery quote.
All deliveries are subject to stock availability and authorisation of payment. We shall endeavour to deliver the Goods you have offered to purchase within 5 working days of receiving your offer; certain items are made to order and as such will generally be delivered within a maximum of 14 days. If there are any delays we will notify you of such as soon as possible.
Should you wish to contact us prior to placing an order we will be happy to confirm current stock availability. Should any item not be available for immediate dispatch, payment would be taken upfront but if you wish to cancel, an immediate refund will be given.
We hold most of the Powerflex stock but in some cases we have to wait for the parts to arrive in stock before we can dispatch them to you. We will inform you if this is the case.
Please do not book your vehicle for installation until you have received your parts.
Return accepted within 30 Days of receipt of bushes. Returns are accepted only if they are in unused condition.
There will be a 25% restock fee if case if the bushes show sign of fitment.
Return postage is not covered unless if the bushes are faulty.
Please note that eBay vehicle compatibility is a guideline only. We recommend that you check OEM part numbers and research to confirm compatibility with your vehicle. Rest assured, if you do order the incorrect part, this can be returned within 30 days.
Powerflex is proud to offer a Lifetime Warranty on the entire range of products we manufacture.
We have taken this decision because of the confidence that we have in both our products and also in the way that we have handled any warranty issues in the past.
We have never had a time period based warranty policy because we have always treated issues that customers have had as an opportunity to learn.
Where a problem has occurred due to incorrect fitting, we have always asked ourselves if the reason for the error was due to poor fitting instructions.
When we have had a part failure we have tried to understand if the part was being used outside of its design parameters, perhaps on a race car running slick tyres. In cases like this, should we be offering a specific motorsport compound?
Like all manufacturing, we have had the occasional material quality issue and in these cases, we have always replaced parts without question.
So now we have decided to formalise our open and honest policy and boast about it!
We will replace any Powerflex product that any customer in the world is unhappy with for any reason.