Powerflex Track Front Radius Arm To Chassis Bushes - Caster Adjustable - BMW 1 Series F20 F21
Unlock sharper steering response, precise alignment control and repeatable handling on track with the Powerflex Black Series front radius arm to chassis bushes for the BMW 1 Series F20 and F21. These caster adjustable polyurethane bushes are engineered for motorsport and track day use, offering a huge performance upgrade over tired factory rubber.
Part number: PFF5-1901GBLK
- Application: BMW 1 Series F20 F21 - front radius arm to chassis
- Black Series compound - 95 Shore A polyurethane for maximum control of chassis geometry
- Over 200% stiffer than the original rubber bush to withstand increased loading
- On-car adjustable caster: +/- 0.75 degrees for improved steering feel
- Additional caster creates additional negative camber on turn for better tyre contact under heavy cornering
- Number of bushes in pack: 2
- Replaces OEM bush part number: 31126855743
- Diagram reference: 1
- Track and Motorsport use - Powerflex Black Series
- Non-adjustable alternative for this position: PFF5-1901BLK
Why choose these Powerflex Black Series bushes for your BMW F20 F21 1 Series
Designed for the track and ready to race, Powerflex Black Series bushes deliver maximum stability, consistency and confidence. By replacing the compliant OEM rubber with a stiffer 95A polyurethane, these front control arm bushes minimise deflection, keep geometry locked in, and help the front end bite harder. The on-car adjustable caster allows you to fine-tune turn-in, straight-line stability and steering feedback, while the extra caster naturally increases negative camber on turn to keep more tyre contact patch on the road during hard cornering.
Proven by us and loved by customers
We have fitted and used these Powerflex Black Series bushes on BMW 1 Series F20 and F21 platforms and the results are excellent. Customers consistently report crisper steering feel, improved front-end precision and dependable performance on spirited drives and track days.
SEO and key search terms
Powerflex Black Series front radius arm to chassis bush BMW F20 F21 1 Series, caster adjustable suspension bushes, front control arm bush, wishbone bush, polyurethane suspension bushes, track day bushes, motorsport bushes, BMW 1 Series suspension upgrade, caster correction bush, camber gain on turn, steering feel improvement, alignment precision, performance handling upgrade, PFF5-1901GBLK, PFF5-1901BLK, replaces 31126855743, BMW F20 front radius arm bush, BMW F21 front radius arm bush, poly bush kit for BMW 1 Series.
Fitting and installation
Professional installation is recommended to ensure correct geometry and to take advantage of the on-car caster adjustment. For fitting on your BMW 1 Series F20 or F21, choose Nforcd in Warwickshire. Request a fitting quote: Sales@nforcd.com.
What you get
- 2 x Powerflex Black Series front radius arm to chassis bushes
- Adjustable bush assemblies for precise caster tuning
Choose Powerflex Black Series PFF5-1901GBLK for a serious BMW 1 Series suspension upgrade that delivers track-focused precision, stronger geometry control and confidence-inspiring steering feel.