Powerflex Black Series Rear Differential Front Bush Insert for BMW 1 Series F20 F21 - the essential track and motorsport upgrade for your BMW 1 Series. This polyurethane insert fits into and fills the voids in the original rear diff front bush to stabilise the differential under acceleration. Ideal for hard road use, track days and racing where sharper drivetrain control, improved throttle response and consistent handling are key.
We have fitted these Powerflex diff bush inserts to customer cars and our own builds. Feedback has been excellent for stability and control on fast road and track. If you are looking for a durable BMW rear differential mount solution that reduces diff movement and tightens up the rear end, this is the go-to upgrade.
Why choose this Powerflex diff bush insert for BMW F20 F21
- Designed for the Track - ready to Race
- Black Series compound - Black 95 Shore A for maximum control of chassis geometry
- Polyurethane insert fills OEM bush voids to stabilise the differential under load
- Enhances drivetrain precision during acceleration and gear changes
- Durable, performance-focused alternative to soft OEM rubber
Key details
- Vehicle fitment: BMW 1 Series F20 F21
- Position: Rear differential front bush insert
- Diagram reference: 27
- Quantity in pack: 2 inserts
- Replaces OEM bush part number: 33316792513
- Series: Powerflex Black Series - for track and motorsport use
- Material: Polyurethane - Black 95 Shore A
SEO fitment and search terms
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Fitting and support
We offer professional installation in Warwickshire. For a fitting quote and availability, contact Nforcd at Sales@nforcd.com.
Why buy from Nforcd
- Trusted performance parts specialist for BMW platforms
- Products we use ourselves with proven results and happy customers
- Expert advice and fitting support available
Note: Powerflex Black Series components are focused on maximum control. Intended for track and motorsport use.