ECS Tuning 95A Performance Polyurethane Rear Differential Bushing Set for BMW M2 M3 M4 (F87 F80 F82 F83, F8X) - Complete Diff and Subframe Mounts

Poly Final Drive and Rear Axle Carrier Mount Kit for BMW F87 F80 F82 F83

Transform the rear end of your F8x M car with this performance polyurethane mount set for the final drive and rear axle carrier. By replacing tired factory rubber with 95A poly, this complete kit tightens the rear of the car, cuts axle tramp and drivetrain lash, and delivers cleaner launches and more consistent traction on fast road, track day, drag strip and drift. You get a connected, confidence‑inspiring drive without the harshness of solid bushes.

What this upgrade does for your F8x

• Locks down unwanted driveline movement for crisper pedal pickup and stronger power delivery.
• Reduces wheel hop and shunt under hard acceleration and gear changes for better grip out of corners.
• Improves rear-end stability and precision, making the car feel planted and predictable.
• Balances performance and comfort with NVH kept sensible for daily use.

Why choose polyurethane mounts

• OEM rubber is a wear item that degrades, causing slop, vibration and inconsistent traction.
• 95A durometer polyurethane controls deflection while still isolating noise and harshness.
• Engineered to cope with high torque and repeated heat cycles common to tuned M cars.

Kit contents and construction

• Complete set of performance bushes for the rear final drive and supporting subframe locations.
• 95A red polyurethane isolators for consistent stiffness and long service life.
• Black Type II anodised 6061‑T6 aluminium sleeves with CNC‑machined inserts for durability and corrosion resistance.

Built to last

• Poly profile and contact area optimised to minimise stress risers and stay within safe compressive strain.
• Resistant to chemicals, road salt and ozone for longevity well beyond standard rubber.

Fitment

BMW F87 M2, F80 M3, F82 M4, F83 M4 on the F8x platform. Ideal as a replacement for cracked or perished factory bushes or as a performance upgrade for tuned vehicles.

Real‑world feedback

We have fitted this poly bush kit on our own builds and many customer cars. Feedback is consistently positive: tighter rear‑end control, far less hop under load and a more connected, confidence‑boosting feel on both road and circuit.

Installation

Press tools are required. Professional fitting strongly recommended. For supply and installation, contact MJ Modifications in Warwickshire for a quote: info@mjmodifications.co.uk.

Key benefits at a glance

• Complete rear final drive and axle carrier mount set in performance polyurethane 95A.
• Sharper power transfer with reduced tramp, shunt and backlash.
• Balanced NVH for daily driving, fast road and motorsport use.
• Premium 6061‑T6 anodised hardware and CNC inserts for strength and corrosion resistance.

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