Powerflex Black Series Polyurethane Rear Diff Mount Bush (Rear Differential/Final Drive Bushing) for BMW M4 F82 F83 4 Series – Track Performance Polybush – Wheel Hop Fix – PFR5-4026BLK – Replaces OEM 33177852495, 33316899168

High-performance polyurethane differential mount for BMW M4 F82 and F83

Transform rear axle control and traction on your BMW M4 with this motorsport-grade differential mounting bush. Built for hard launches, track days and fast-road driving, this upgrade delivers sharper throttle response, reduced wheel hop and consistent power delivery by keeping the final drive securely located under load.

Engineered from Black 95A Shore polyurethane with an integrated alloy support washer, it resists distortion far better than ageing rubber and helps stop drivetrain wind-up. The result is a tighter rear end, improved stability on corner exit and more confidence when using launch control or sticky tyres.

Why enthusiasts choose this rear differential mount

• Limits driveline movement to cut axle tramp and improve traction
• Integrated support washer in black anodised 2011-T6 aluminium for added stability
• Durable 95A performance polyurethane for long service life
• Ideal for spirited road use and circuit work
• Direct replacement for tired OE rubber bushes

Compatibility and options

This replacement rear final drive mount can also be paired with the PFR5-4030 dual-mount rear differential bracket to install two bushes in the factory positions for even greater rigidity. Perfect for high-power builds seeking maximum rear-end control.

Fitment

• BMW M4 Coupe and Convertible F82 and F83
• Replaces OE bush references: 33177852495 and 33316899168
• Diagram reference: 22

What you receive

• Quantity: 1 bush
• Material: Black 95A polyurethane with black anodised 2011-T6 aluminium support washer
• Part number: PFR5-4026BLK also referenced as PFR5-4026

Real-world results

We run this bush on our own builds and customer cars with excellent feedback. Owners report crisper gear changes under load, reduced diff shunt and far less wheel hop during aggressive launches. It is a must-have upgrade if you are chasing consistent grip and rear-end precision.

Professional installation

Want it fitted right first time? Book installation with MJ Modifications in Warwickshire. Request a fitting quote by emailing info@mjmodifications.co.uk.

Search-friendly terms

BMW M4 rear differential bush, F82 F83 diff mount, rear final drive mount, polyurethane diff bushing, rear axle bush upgrade, driveline mount, wheel hop fix, axle tramp solution, Black Series poly bush, performance differential mount, BMW 4 Series M4 rear diff support, subframe and diff mounting upgrade.