Powerflex Black Series PFR5-4025BLK Rear Differential Front Mount Bushes/Bushings | Diff Mount Hanger Bracket Kit for BMW M2 M3 M4 F80 F82 F83 F87 (S55) Polyurethane F8x Diff Carrier Poly Bush Upgrade OE 33172284774

Rear Differential Front Mount Bushing Upgrade for BMW F80 F82 F83 F87 M2 M3 M4

Sharpen your F8x platform with a race-focused front hanger bushing set for the rear differential. This hard-compound poly bushing kit replaces the soft factory rubber in the diff carrier bracket to control movement under load, giving cleaner throttle pick up, improved stability on corner exit and a far more connected rear end on BMW M2, M3 and M4 models.

Engineered in the Black Series specification from Powerflex, these motorsport-grade mounts use integrated alloy sleeves to reinforce the assembly for consistent support during launches, aggressive gear changes and high-grip driving. Expect reduced driveline shunt, less axle tramp and more predictable power delivery on both fast road and track days.

Main benefits

• High-durometer polyurethane bushings restrain differential movement for crisper response
• Improves traction, rear axle control and launch consistency while minimising wheel hop
• Alloy inner sleeves add rigidity and long-term durability under repeated high loads
• Direct swap for OE rubber in the diff front mounting bracket with no permanent mods
• Ideal for spirited driving, track work, drag starts and tuned S55-powered cars

What you receive

• 4 x front differential mounting bushings with integrated sleeves

Fitment

• BMW F87 M2 2014 to 2019
• BMW F80 M3 2012 to 2018
• BMW F82 M4 Coupé and F83 M4 Convertible 2013 to 2019

OEM cross reference 33172284774. Diagram reference 21.

Part number

PFR5-4025BLK

Why we rate it

We run this setup on our own cars and customer builds. Feedback is consistently strong, with owners reporting tighter rear-end control, better confidence on throttle and a noticeable reduction in unwanted diff movement when pushing on.

Installation

Professional fitting recommended. Book with MJ Modifications in Warwickshire. For a tailored quotation email info@mjmodifications.co.uk.

Compatibility check

Before dispatch we verify fitment. Add your UK registration or last 7 digits of VIN at checkout and we will confirm it suits your M2, M3 or M4.

Photos and installation guide

Download fitting instructions

Search terms

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