STXTA Coilover Kit - Z4 E85

Transform the handling of your BMW Z4 E85 with a height adjustable performance suspension

Looking for sharper turn in, reduced body movement and a lower, cleaner stance on your Z4 E85? The XTA adjustable suspension from ST delivers precision control for fast road and track day use, with on-car rebound tuning and camber adjustable front top mounts for dialled-in alignment and confidence at speed. We have fitted these kits in-house and our customers love the balance of ride quality and grip. If you want road comfort with serious performance when you need it, this is the upgrade.

Why enthusiasts choose this XTA adjustable suspension

• KW engineered damping with quick-access rebound adjuster at the top of the piston rod for easy, on-car fine tuning
• Aluminium spherical bearing top mounts on supported axles for camber and caster adjustment to optimise tyre contact and cornering stability
• Continuous ride height adjustment via threaded bodies for a precise drop and perfect stance
• Twin tube damper design with low-friction internals for consistent performance and control
• Galvanised steel struts with additional protective coating for long term corrosion resistance in UK weather
• Complete kit with matched performance springs, adjustable spring seats, bump stops and dust boots

Lowering range and axle loads

• Front drop: 20 to 50 mm
• Rear drop: 15 to 40 mm
• Maximum permitted axle load: Front 790 kg, Rear 890 kg

Set your ride height for a purposeful look and improved aerodynamics, then fine tune rebound to suit your tyres and roads. Stiffen for track sessions to increase stability and reduce roll, or soften for daily commuting comfort. With camber and caster adjustment available via the aluminium pillowball top mounts on supported axles, you can achieve aggressive fast road alignment or a square setup for even tyre wear.

Built for real-world driving and UK conditions

Developed with KW know-how for ST, the dampers use robust housings, multi-stage sealing and precise guide bushings to minimise friction and keep performance consistent over time. The coating on the galvanised bodies helps resist corrosion, making this suspension a smart long-term choice for British roads.

Perfect for

• BMW Z4 E85 owners wanting a premium height adjustable damper and spring kit
• Track day setup with camber plate adjustment for better front end grip
• Fast road alignment, improved turn in and reduced squat and dive
• Lowered stance with proper geometry and ride quality

Search-friendly compatibility and upgrade terms

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Fitting and setup

Want it installed and aligned by specialists? Book professional fitting and geometry with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and advice on setup tailored to your driving.

Note: Ride height ranges and adjustability can vary by vehicle configuration. Always verify your vehicle’s axle loads before ordering.