Powerflex Poly Bushes Pack Front Radius Arm To Chassis Bushes - Z4 E89 (2009 -) - PFF5-401G

BMW Z4 E89 Caster‑Adjustable Polyurethane Front Tension Strut Bush Kit – PFF5-401G

Transform the front-end of your BMW Z4 E89 (2009 onward) with this premium polyurethane front tension strut to body bush kit. Designed for drivers who want sharper steering, better braking stability and repeatable alignment on fast road and track days, this kit is a direct upgrade over tired factory rubber.

Part number: PFF5-401G

Why this upgrade

• Sharper turn-in and more precise steering feel
• Improved high-speed stability and braking confidence
• On-car caster tuning for real geometry control
• Reduced deflection compared with ageing OEM rubber
• Durability for fast road and track use

Key features and materials

• 95A Black polyurethane for maximum stiffness and control
• Steel outer shells for superior load distribution
• Offset, adjustable CNC‑machined stainless-steel inner sleeve with supplied spanner
• Provides up to +/- 0.75 degrees of caster adjustment on the car
• Approximately 25% stiffer than the previous design and around 140% stiffer than worn rubber
• Pack contains 2 bushes
• Diagram reference: 1

Real-world gains you will feel

More in-corner camber gain for extra front grip, reduced wander under braking and far better consistency from your alignment settings. Expect tighter geometry control, less wheel hop and a more connected front axle on B-roads, motorway stints and circuit laps.

Compatibility and OE cross-references

Front tension strut to chassis position on BMW Z4 E89. Also known as front radius rod bush, thrust arm bush, wishbone rear bush or lollipop bush.

Replaces OE part numbers: 31120393540, 31126763719, 31102283579.

Trusted by enthusiasts

We fit these regularly and customer feedback is consistently excellent. A proven handling upgrade for drivers who want fast-road response and track-day reliability from their Z4 E89 suspension.

Fitting and support

Professional installation recommended. Book fitting with MJ Modifications in Warwickshire and request a quote at info@mjmodifications.co.uk.

Search-friendly highlights

BMW Z4 E89 suspension upgrade, polyurethane control arm bushes, caster adjustable front arm bushings, tension strut to body mounts, radius arm to chassis bush kit, front wishbone bush E89, track day suspension, fast road geometry upgrade, steering precision, camber gain, alignment correction.