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

BMW Z4 E89 2009+ Front Tension Strut To Body Polyurethane Bush Kit - Caster Adjustable

Part number: PFF5-401GBLK

Unlock sharper steering, rock-solid stability and precise alignment control on your BMW Z4 E89 with this caster-adjustable polyurethane suspension bush kit. Built from an ultra-stiff 95A Black Series compound and engineered with steel outer shells plus a CNC-machined stainless sleeve, this motorsport-grade upgrade is ideal for fast road and track-day use where consistency and control matter.

Why enthusiasts choose this upgrade

• On-car caster adjustment of +/- 0.75 degrees for fine-tuning front-end geometry
• Stiffer construction increases support and reduces compliance under braking and cornering
• Delivers greater in-corner camber gain and enhanced high-speed stability
• Steel outer shells improve load distribution and durability
• Supplied with an offset adjustable CNC-machined stainless-steel sleeve and spanner

Feel the difference

• Cleaner turn-in and more direct steering feedback
• Improved braking stability with reduced fore-aft movement of the front arm
• Confidence-inspiring front axle control on road and circuit

Track-proven Black Series construction

Manufactured in a 95 Shore A compound specifically developed for motorsport, this kit is designed for maximum control of suspension geometry. The latest design delivers a further 25 percent stiffness increase over the previous version and a 140 percent gain compared to a tired OE rubber bush.

Fitment and technical details

• Vehicle: BMW Z4 E89 2009 onward
• Location: Front lower control arm rear position to chassis
• Adjustment range: +/- 0.75 degrees caster
• Quantity in pack: 2
• Diagram reference: 1
• Replaces OE numbers: 31120393540, 31126763719, 31102283579
• Black Series - for Track and Motorsport use

Real-world results

We have installed this kit on customer Z4 E89 builds and the feedback is consistent: tighter front-end feel, more predictable alignment under load and a noticeable improvement in steering precision. It is a go-to upgrade for drivers who want dependable performance lap after lap.

Professional fitting

Want it installed correctly the first time with a setup tailored to your car and driving style? Book professional fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote.

Search-friendly terms to help you find the right upgrade

BMW Z4 E89 front control arm rear bushes, tension strut to body bushings, caster adjustable polyurethane bush kit, front wishbone rear mount upgrade, camber gain and caster correction bushings, fast road and track suspension upgrade, Black Series 95A durometer bushes, stainless sleeve adjustable alignment kit, front axle handling upgrade for Z4 E89.