Powerflex Track Rear Diff Rear Mounting Bush - G82, G83 M4 (2020 on) - PFR5-4026BLK

Track-focused rear differential mount upgrade for BMW M4 G82 and G83, 2020 onwards

Looking to eliminate axle tramp and keep the rear end planted on launches and corner exit. This motorsport-grade rear final drive mounting bush is the go-to upgrade for serious fast-road and track-day M4 builds. Constructed from ultra-stiff 95A polyurethane with a built-in support washer and paired with black anodised 2011-T6 aluminium hardware, it controls differential movement under load, maximises traction and improves throttle response.

Why choose this rear diff mount

• Significantly reduces drivetrain deflection for sharper power delivery
• Cuts wheel hop on hard launches and aggressive upshifts
• Consistent performance under heat and repeated abuse, unlike ageing rubber
• Black Series 95A hardness for track readiness and long-term durability
• Integrated support washer adds extra stability to the rear final drive

Compatibility

Designed specifically for BMW M4 G82 coupe and G83 convertible, 2020 on.

Part numbers and options

• Primary part number: PFR5-4026BLK
• Also referenced as: PFR5-4026
• Optional accessory: PFR5-4030 dual-mount rear differential bracket, allows two bushes to be installed in the factory locations for even greater control
• Diagram reference: 22

OEM cross references

Replaces OE bush part numbers: 33177852495, 33316899168.

Pack contents

Quantity: 1 rear differential mounting bush.

Real-world results

We have fitted this upgrade to customer G82 and G83 builds and the feedback is outstanding, with markedly improved traction, reduced axle tramp and a more connected rear end under power.

Fitting and support

Professional installation recommended. For fitting, contact MJ Modifications in Warwickshire for a quote at info@mjmodifications.co.uk.

Search-friendly terms

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