Powerflex Black 95A Caster-Adjustable Poly Bush Kit - Front Radius Arm to Chassis Bushes (Wishbone Rear / Control Arm Rear / Tension Strut / Radius Rod) BMW 1 Series E81 E82 E87 E88 2004-2013 - PFF5-401G

Caster-Adjustable Polyurethane Front Radius Arm Mount Set for BMW 1 Series E8x

Unlock sharper steering, greater stability and repeatable alignment with this precision front end upgrade for BMW 1 Series E81, E82, E87 and E88 models built from 2004 to 2013. Engineered from a tough Black 95A polyurethane with steel outer shells and an offset CNC-machined stainless sleeve, this kit delivers on-car caster adjustment for road and track day setups while resisting the deflection that plagues tired factory rubber.

Part number: PFF5-401G

Why enthusiasts choose this upgrade

• On-car caster tuning of up to +/- 0.75 degrees for dialled-in front geometry
• More mid-corner camber gain and improved high-speed stability
• Steel outer shells spread loads for precise location and long-term durability
• Stainless offset sleeve with spanner included for quick, repeatable adjustments
• 25 percent stiffer than the previous design and approximately 140 percent stiffer than a worn OE rubber mount, aiding braking stability and turn-in
• Ideal for fast-road driving while capable on circuit

Real-world results

We run these on our own builds and the difference is immediate. Customers report reduced wander under braking, a tighter steering response and more consistent tyre wear thanks to better control of the front arm rear mount under load.

Fitment

Designed for BMW 1 Series E81, E82, E87 and E88 models from 2004 to 2013. This set replaces the rear mount on the front tension strut, also known as the radius rod or front control arm rear bush position.

What you get

• Quantity in pack: 2 mounts
• Adjuster spanner included
• Diagram reference: 1

OEM cross-reference

Replaces OE numbers: 31120393540, 31126763719, 31102283579

Usage

Road and fast-road applications where improved handling precision, reduced compliance and stable alignment are priorities.

Installation

Professional fitting recommended. We offer installation at MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Search-friendly terms

BMW E8x caster adjustable bush kit, front control arm rear bushings, tension strut mounts, radius rod to body mounts, polyurethane suspension bushes, 1 Series handling upgrade, wishbone rear bush, camber gain, track day alignment, fast road suspension.