Powerflex PFR5-4030 Twin-Mount Conversion Rear Differential Brace / Final Drive Support Bracket for BMW F87 M2, F80 F82 F83 M3/M4 (F8x) - Rear Diff Mount Upgrade Kit, Wheel Hop/Axle Tramp Fix, Subframe Diff Carrier

Powerflex PFR5-4030 Twin-Mount Final Drive Support for BMW F87, F80, F82, F83

Stop rear-end shuffle and put power down cleanly with this uprated rear final drive support from Powerflex. Part number PFR5-4030 transforms the F8x chassis by converting the factory single mounting point into a secure twin-mount arrangement, tightening up the drivetrain for crisper response, stronger traction and a quieter, more controlled rear axle on fast road and track.

Why enthusiasts choose it

• Controls diff movement under load for a planted, predictable rear axle
• Sharper throttle pick-up and more consistent power delivery out of corners
• Helps cure wheel hop and rear-end clunking caused by soft or ageing rubber
• Protects surrounding components by spreading torque reaction across two mount points
• Ideal for tuned cars running sticky tyres, hard launches and aggressive on-off throttle use

Engineered to last

• CNC machined 6082 high-tensile aluminium carrier for strength without excess weight
• Satin black anodised finish for corrosion resistance and durability in all UK conditions
• Optimised geometry to minimise deflection under high torque loads
• Compatible with standard rubber or aftermarket polyurethane rear mounting bushes

What is included

• Powerflex PFR5-4030 twin-mount bracket
• M14 bolt with thread locker
• Powerflex keyring

Recommended pairings for maximum control

• PFR5-4026 rear mounting bush, fit both rear subframe positions for a true twin-mount setup
• PFR5-4025 front mounting bushes to stabilise the final drive under braking and acceleration

Fitment

Designed for BMW F87 M2, F80 M3, F82 M4 and F83 M4 Convertible. Installation can be completed without fully removing the rear subframe, making it a smart upgrade while doing exhaust, bush or diff service work.

Professional installation

For a hassle-free fit, book MJ Modifications in Warwickshire. Our team has installed this part on our own builds and many customer cars with excellent feedback on driveability and traction. Request a fitting quote at info@mjmodifications.co.uk.

Real-world results

We run this upgrade on shop cars and customer vehicles. Drivers report cleaner launches, less axle tramp, reduced rear-end noise on gear changes and a more confidence-inspiring feel when pushing on B-roads and track days.

Product details

• Brand: Powerflex Road Series
• Part number: PFR5-4030
• Diagram reference: 30
• Use: road, fast road and track day

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Upgrade your F87, F80, F82 or F83 with PFR5-4030 and enjoy tighter drivetrain control, improved traction and dependable performance. Order now and contact MJ Modifications for expert fitting.