Powerflex Black Series Polyurethane Front Tension Strut/Thrust Arm Bushing Kit, Caster Adjustable Caster Correction, BMW Z4 G29 2018-on Front Lower Control Arm/Wishbone Radius Rod to Chassis Suspension Upgrade 95A - PFF5-5401GBLK

BMW Z4 G29 2018 onwards front tension strut to body polyurethane kit that delivers precise steering, tighter alignment control and serious performance for fast laps and hard driving. This Black Series PFF5-5401GBLK upgrade uses a high-durometer compound and motorsport-grade hardware to keep the front axle planted and predictable when you lean on the brakes or commit to turn in.

We have fitted this exact setup for customers and on our own builds, and the feedback is consistently excellent for response, stability and confidence at speed.

• Part number: PFF5-5401GBLK
• Vehicle: BMW Z4 G29 2018 onwards
• Diagram reference: 1
• Quantity in kit: 2 bushes

Why choose this upgrade

• 95A hardness Black Series compound with anodised aluminium outer shells for maximum chassis control
• Up to 300% stiffer than factory rubber to limit fore and aft wheel movement under braking and cornering loads
• On-car caster adjustment of approximately ±0.75 degrees to sharpen turn in, enhance steering feel and help correct pull
• CNC machined stainless steel inner sleeve for smooth, precise adjustment and long-term durability
• Improves alignment stability, can promote longer tyre life and enhances braking stability
• Designed for track days and motorsport where geometry control is critical

What you get

• Pair of front tension strut bushes with alloy shells and stainless sleeves
• Black 95 Shore A compound engineered for competition use

Cross-reference OE numbers

31106878587, 31106878588, 48640-WAA02, 48620-WAA02

Fitment and support

For professional installation and setup, book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and advice on geometry settings for your driving style.

Search terms that help owners find this upgrade: BMW Z4 G29 suspension upgrade, polyurethane control arm bushes, front tension strut bushings, caster correction kit, front axle bush kit, performance handling upgrade, Black Series bushings, track day suspension, steering precision upgrade, wishbone bush kit, alignment stability, hard durometer bushes.