Powerflex Poly Bushes Pack - Rear Subframe Rear Bush Insert - PFR5-1921 - BMW 4 Series F32 F33 F36
Upgrade your BMW 4 Series handling with the Powerflex PFR5-1921 Rear Subframe Rear Bush Insert. This high performance polyurethane bush insert fits into the voids of the factory rear subframe bush to reduce unwanted movement, sharpen chassis response, and deliver tighter, more predictable handling on the road and track. If you are searching for BMW 4 Series rear subframe bush insert, Powerflex poly bushes, polyurethane bushings, or performance suspension upgrade for F32 F33 F36, this is the proven solution.
Key features and benefits
- Precise handling and improved stability under acceleration, cornering, and braking
- Reduces subframe movement for better traction and driver confidence
- Improved tyre contact patch and reduced uneven tyre wear
- Durable polyurethane construction that resists ageing, oil, road salt, and abrasion
- Fast road and performance driving friendly with excellent control of flex
- Greater cost-effectiveness versus repeatedly replacing soft rubber bushes
- Powerflex Lifetime Warranty for long-term peace of mind
What this part does
This is an insert that fits into voids in the original rear subframe bush to limit compliance. By controlling the amount of flex in the suspension, Powerflex poly bushes ensure the suspension does what it is supposed to do, keeping the tyres in better contact with the road for safer, faster, and more consistent performance.
Why choose Powerflex poly bushes for your BMW 4 Series
- Sharper steering response and chassis feel
- Enhanced braking stability and reduced rear-end float
- Prolonged tyre life and more consistent grip
- Outstanding NVH control when correctly formulated compared with ageing rubber
Fitment
- BMW 4 Series F32 Coupe, F33 Convertible, F36 Gran Coupe
- Rear Subframe Rear Bush Insert
- Diagram Reference: 21
- Number of bushes in the pack: 2
- Powerflex Part Number: PFR5-1921
- OEM cross reference for identification: 33316792510
What our customers say
We have fitted this Powerflex PFR5-1921 insert on customer cars and run it ourselves. The feedback is consistently positive: tighter rear-end control, improved confidence in fast corners, and a noticeable reduction in subframe movement without the drawbacks of rapidly wearing rubber.
Fitting and installation
Professional fitting recommended. For installation by specialists, choose Nforcd in Warwickshire. Request a fitting quote at Sales@nforcd.com.
Ideal search terms
Powerflex PFR5-1921, BMW 4 Series poly bushes, BMW F32 rear subframe bush insert, F33 polyurethane bushings, F36 rear subframe insert, Powerflex rear bush kit, BMW suspension upgrade, rear subframe bushing upgrade, performance bushes BMW 4 Series, polyurethane suspension bushes, track day suspension, fast road bushes.
Warranty
Backed by the Powerflex Lifetime Warranty for confidence and durability.