Powerflex Black Series Rear Diff Front Mounting Bush for BMW F20 F21 F30 F31 – PFR5-425BLK
Upgrade your BMW drivetrain with the Powerflex Black Series rear differential front mounting bush. Engineered for track, race and rally, these high-performance polyurethane bushes use a 95 Shore compound for maximum control of chassis geometry. Ideal for BMW enthusiasts who want sharper handling, reduced differential movement and rock-solid consistency under hard acceleration, cornering and braking.
We have fitted and used these bushes on our own builds and customer cars, and the feedback is consistently excellent. Expect a tighter, more precise rear end, improved traction and a more direct drivetrain feel compared with tired OEM rubber.
Key Features and Benefits
- Powerflex Black Series 95 Shore polyurethane for motorsport-level stiffness and control
- Rear differential front mounting bush location for accurate diff support and stability
- Improves handling precision, reduces differential movement and helps curb wheel hop
- Maintains alignment under load for consistent geometry on track and fast road
- Durable polyurethane resists wear, oil and temperature far better than rubber
- Genuine Powerflex performance upgrade for BMW F20, F21, F30 and F31 models
Part Numbers
- Powerflex Part Number: PFR5-425BLK
- OEM Cross-Reference: 33176760287
Compatibility
- BMW 1 Series: F20 and F21 (2011–2019)
- BMW 3 Series: F30 and F31 (2011+)
In the Box
- 2 x bushes (you will require 2 bushes per car)
Why Choose This Upgrade
This Powerflex Black Series rear diff front mounting bush is a proven performance upgrade for BMW F20, F21, F30 and F31 platforms. It is the go-to solution for owners seeking a BMW diff bush upgrade, rear differential bush replacement, polybush diff mount and motorsport-grade differential bushing. Perfect for track-day, race, rally and fast-road BMW builds where precision and durability are critical.
Fitting and Support
Professional installation recommended. As with all stiff performance bushes, expect an increase in NVH compared with standard rubber.
Need fitting? Nforcd offers expert installation at our Warwickshire workshop. Request a quote: Sales@nforcd.com.
Compatibility Check
To ensure the part fits your vehicle, we run a compatibility check prior to dispatch. Provide your registration number (UK) or the last 7 digits of your VIN at checkout.
Manufactured by
Powerflex
Download the installation guide
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