Powerflex Black Series Rear Subframe Rear Bush Insert for BMW 4 Series F32, F33, F36
Part number: PFR5-1921BLK
Unlock sharper handling, tighter rear-end control and serious track performance with the Powerflex Black Series rear subframe rear bush insert for the BMW 4 Series F32, F33 and F36. Engineered specifically for track and motorsport use, this insert fits into the voids of the original OEM bush to reduce subframe movement. The result is improved chassis precision, better traction on corner exit and more confident high-speed stability.
Manufactured in Powerflex’s Black 95 Shore A polyurethane, the Black Series delivers maximum control of chassis geometry under hard braking, fast direction changes and heavy load. If you want a no-nonsense, track-focused BMW 4 Series rear subframe bush upgrade, this is the proven solution.
Why choose this Powerflex bush insert
- Track-ready Black Series 95A compound for ultimate rigidity and control
- Insert design fits into the voids of the factory bush to reduce subframe movement
- Sharper turn-in, improved traction and reduced wheel hop during hard launches
- More consistent alignment and geometry under load for predictable handling
- Durable polyurethane resists oil, heat and wear better than rubber
- Pack contents: 2 bush inserts
- Diagram reference: 21
- OE reference: 33316792510
Proven on our builds and by our customers
We have fitted and used these Powerflex rear subframe inserts on BMW F-Series cars and customer feedback has been consistently positive. Expect tighter rear-end response, more confidence on track days and a more planted feel when pushing on B-roads or in competition settings.
Fitment
Designed for the BMW 4 Series:
• F32 Coupe
• F33 Convertible
• F36 Gran Coupe
Installation and support
Professional installation is recommended for best results. For expert fitting and setup, choose Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com.
Built for the track
This Powerflex Black Series insert is intended for track and motorsport use, where maximum control and feedback are the priority.
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