STXA Coilover Kit - M3 (E46); (M346) coupe, convertible 06/00-

Adjustable Suspension Upgrade for BMW M3 E46 Coupe and Cabriolet

Transform your E46 chassis with the ST Suspensions XA height adjustable spring and damper package. Developed in partnership with KW Automotive, this performance suspension delivers crisp handling, real-world ride comfort on UK roads, and on-car rebound tuning so you can dial in your ideal fast road or track day setup. It is the go-to choice for BMW M3 owners who want sharper turn in, reduced body movement, and a purposeful stance without sacrificing daily drivability.

Why enthusiasts choose this kit

• Ride height tuning front and rear for the perfect stance and corner balance
• On-vehicle rebound adjustment via the top of the piston rod for quick setup changes
• Twin-tube damper design engineered by KW for stability, control and comfort
• Galvanised steel bodies with multi-layer protection for corrosion resistance in British weather
• Vehicle-specific spring rates and valving for the E46 platform
• Complete front and rear solution designed for fast road, spirited driving and occasional circuit use

Lowering range and axle loads

• Front drop: 20 to 40 mm
• Rear drop: 20 to 40 mm
• Maximum permitted front axle load: 990 kg
• Maximum permitted rear axle load: 1170 kg

Fitment

Exact-fit for BMW M3 E46 Coupe and Convertible from 06/2000 onwards. Threaded adjusters allow precise height changes with the kit installed.

Real-world results

We use this setup ourselves and our customers consistently report tighter body control, improved mid-corner confidence and a smoother, more composed ride. It is a superb balance for daily driving, B-road blasts and weekend events.

Built to perform and last

Manufactured to a high standard with a low-friction guide and seal package, these dampers offer consistent performance and long-term durability. The adjustment range is TÜV approved and the components are designed to withstand grime, salt and rain on UK roads.

Get it fitted by specialists

For professional installation, geometry and a tailored setup, book with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and advice on fast road or track-focused alignment.

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