Performance M
STX Coilover Kit - Z3 M; (MR/C) M Roadster / M roadster 03/97-
STX Coilover Kit - Z3 M; (MR/C) M Roadster / M roadster 03/97-
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Height Adjustable Suspension Kit for BMW Z3 M Roadster and M Coupe 03/1997 onwards
Transform the way your Z3 M drives and sits with this ST X height-adjustable suspension system. Engineered by KW Automotive in Germany, this spring and damper package delivers precision handling, a tighter chassis feel, and a purposeful drop that sharpens turn in and reduces wheel arch gap without ruining daily comfort. Ideal for fast road use, stance-focused builds, and weekend blasts.
We have fitted these on customer BMW Z3 M builds at MJ Modifications and the feedback has been superb. Ride quality remains composed, cornering grip improves noticeably, and the car gains a lower, more aggressive look that still feels refined on British roads.
Lowering range and axle limits
- Front drop: 30 to 60 mm
- Rear drop: 20 to 50 mm
- Maximum permitted axle load: Front 850 kg, Rear 890 kg
Fits
BMW Z3 M Roadster and BMW Z3 M Coupe from 03/1997 onwards.
Why this suspension upgrade
- Height adjustable threads on both axles for a tailored stance and corner balance
- Sporty road handling with reduced body roll and sharper response
- Durable twin-tube dampers for consistent performance
- Galvanised strut bodies with an additional protective coating to fight corrosion
- Chrome plated piston rods and a robust multi-seal package for longevity in all weather
- Lightweight race-style spring system with adjustable spring perch
- Simple ride height changes via the polyamide adjuster ring
Built by KW Automotive
This X Series kit is produced by KW Automotive, bringing proven German engineering to a road-friendly, height-adjustable package. Expect dependable damping control, precise build tolerances, and a finish designed to last through UK winters.
Real-world results
Owners report a flatter cornering attitude, improved steering feel, and a confident, planted rear end. The adjustability lets you dial in your preferred ride height for a road-biased setup or a lower, show-ready look while maintaining usable travel.
Installation and setup
Professional fitting is recommended for best results and accurate alignment. For installation, setup, and geometry, book with MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.
Helpful search terms
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