Powerflex Dual-Mount Rear Diff Brace / Differential Support Bracket for BMW F8x M2 M3 M4 (F80 F82 F83 F87) – Twin Bolt Rear Diff Mount Upgrade, Anti Wheel Hop, Billet CNC 6082 Aluminium Satin Black – Replaces BMW 33172284775 Subframe Reinforcement

Transform rear axle control on your F8x with a twin-point final drive mount

This Powerflex two-point rear final drive support is the go-to upgrade for the BMW F8x platform. By activating the unused factory boss on the subframe, it converts the single rear bush arrangement into a stable twin-bolt setup that resists torque reaction. The result is tighter driveline control, cleaner launches and a calmer rear end on the road and on circuit.

Precision CNC machined from high‑tensile 6082 aluminium and finished in a discreet satin black anodise, this billet bracket delivers strength without adding unnecessary weight. It is built for fast-road use and track work where repeated hard acceleration can reveal the limits of the standard arrangement.

Why it works

The factory layout uses only one rear bush which can allow the differential housing to rotate under load. That movement shows up as wheel hop, axle tramp, shunt and clunky noises. This bracket engages the second OE mounting point to share the load across two rear bushes, keeping the final drive locked in place for consistent power delivery and improved traction.

Highlights

• Twin-point rear mounting for the final drive using both OE subframe bosses
• Billet 6082 aluminium with a corrosion-resistant satin black finish
• Cuts unwanted driveline movement for sharper throttle pick-up
• Helps reduce hop and tramp for better grip off the line and out of corners
• Distributes load to protect surrounding components and bushes
• Straightforward bolt-on installation with supplied M14 bolt and thread locker

Vehicle compatibility

• BMW M3 F80
• BMW M4 F82 Coupe
• BMW M4 F83 Convertible
• BMW M2 F87

Installs alongside the existing rear bush. Works with standard rubber or uprated rear bush options if you are refreshing mounts at the same time.

What you get

• Powerflex rear final drive bracket in satin black 6082 aluminium
• M14 fixing bolt and thread locker

Cross-reference

Replaces BMW part number: 33172284775

Fitting and support

We have installed this on customer F8x cars at MJ Modifications and the feedback is consistently positive. Owners report a more planted rear axle, reduced clunking and noticeably better traction. For professional installation, book with MJ Modifications, Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

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