Powerflex PFF5-401G BMW Front Radius Arm to Chassis Bush with Caster Adjust
Unlock sharper steering, improved stability and repeatable alignment with the Powerflex PFF5-401G front radius arm to chassis bush. This caster adjustable poly bush kit is designed for BMW E81, E82, E87, E88, E90, E91, E92 and E93 chassis, delivering serious performance on road and track.
Engineered in Powerflex’s stiffest Black 95A polyurethane and supplied with steel outer shells, an offset adjustable CNC machined stainless steel sleeve and a spanner, this front control arm bush replaces the soft, ageing rubber lollipop bush to dramatically reduce deflection. On-car caster adjustment of +/- 0.75 degrees allows precise front wheel geometry tuning for greater in corner camber gain, improved high speed stability, crisper turn in and better braking stability.
We run these ourselves and our customers love the transformation in steering feel, front end grip and confidence. If you are building a fast road or track-ready BMW 1 Series or 3 Series, this is the go to caster adjust bush upgrade.
Key features and benefits
- Part number: PFF5-401G – Powerflex BMW front radius arm to chassis bush with caster adjust
- On car caster adjustment of +/- 0.75 degrees for easy alignment tuning
- Black 95A polyurethane for maximum stiffness and durability
- Steel outer shells for superior load distribution and longevity
- Offset adjustable CNC machined stainless steel sleeve and included spanner
- Reduce bush deflection, tramlining and braking shimmy
- Sharper steering response, improved camber gain and high speed stability
- Ideal for road and track use, perfect suspension refresh for E8x and E9x chassis
- Also known as front control arm bush, tension strut bush, lollipop bush, radius arm bush
Why choose this Powerflex caster adjustable bush
More and more owners are using cars like the BMW E92 and E82 on circuit. With modern power and chassis upgrades, a precise and durable front radius arm bush becomes essential. PFF5-401G gives you the geometry control and feedback you need without the harshness of solid mounts, making it a brilliant choice for fast road and track day BMWs including popular builds based on the E92 and the E82 1 Series Coupe.
In the box
- 2 x bushes with steel outer shells and offset adjustable stainless steel sleeve
- Adjustment spanner
You will require 2 bushes per car.
Replaces OEM part numbers
- 31120393540
- 31126763719
- 31102283579
Compatibility
BMW 1 Series: E81, E82, E87, E88 (2004 to 2013)
BMW 3 Series: E90, E91, E92, E93
Fitting and alignment
Professional fitting recommended. For installation and alignment setup, book with Nforcd in Warwickshire. Request a fitting quote at sales@nforcd.com.
Compatibility check
We run a compatibility check prior to dispatch. Provide your UK registration or the last 7 digits of your VIN at checkout to ensure the correct fitment.
Manufactured by
Powerflex
Part number
PFF5-401G
Images

Fitted photos
Search friendly terms
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