Powerflex Rear Differential Front Mounting Bush Kit for BMW F80 F82 F83 M3/M4 — Polyurethane Polybush — PFR5-4025 — Replaces 33172284774
Transform the way your BMW F8x drives with the Powerflex rear differential front mounting bush kit. This direct-fit set of 4 polyurethane polybushes replaces the soft factory rubber bushes in the front diff mounting bracket on the BMW F80 M3, F82 M4 and F83 M4. Powerflex PFR5-4025 tightens up rear-end control, reduces diff movement, improves traction, sharpens throttle response and helps eliminate wheel hop and drivetrain shunt on fast road and track.
Engineered with aluminium sleeves featuring built-in support, these bushes deliver precise location and long-lasting durability compared with OEM rubber. The result is a more planted, confidence-inspiring rear axle with cleaner power delivery and crisper gear changes without a harsh ride. We run these bushes on our own cars and have fitted them for many Nforcd customers, with consistently excellent feedback on stability, grip and overall drivability.
Key features and benefits
- Direct replacement rear differential front mounting bushes for BMW F80 M3, F82 M4 and F83 M4
- Polyurethane polybush upgrade controls diff movement for improved stability, traction and response
- Aluminium sleeves with built-in support increase precision and durability over OEM rubber
- Reduces wheel hop, axle tramp and drivetrain wind-up under hard acceleration
- Ideal for fast road and track day use while maintaining excellent refinement
- Proven reliability and performance on the F8x M3/M4 platform
What’s included
- Set of 4 x rear differential front mounting bushes with sleeves
Fitment
- BMW F80 M3 2014+
- BMW F82 M4 2014+
- BMW F83 M4 2014+
Part numbers
- Powerflex Part Number: PFR5-4025
- Replaces OEM Part Number: 33172284774
Why choose this Powerflex diff bush kit for your BMW M3/M4
If you are searching for a BMW M3 rear diff bush upgrade, BMW M4 rear diff mount bushes, or a Powerflex F80 F82 F83 differential front mounting bush kit, this PFR5-4025 set is the go-to solution. It outlasts OEM rubber, tightens the rear subframe-to-diff relationship and gives your F8x sharper response with improved traction and control. Perfect for owners wanting a performance handling upgrade that feels OEM-plus on the road and confidence-inspiring on track.
Compatibility check
We will verify compatibility before dispatch. Please provide your UK registration number or the last 7 digits of your VIN at checkout.
Installation and fitting
Professional fitting is recommended. For expert installation at Nforcd in Warwickshire, request a quote at Sales@nforcd.com.
Installation guide: Download Powerflex fitting instructions
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