STX Coilover Kit - 4-series (F32, F33, F36); (3C) coupe; 2WD without electronic dampers max. allowed axle weight in kg Front: -950

BMW F3x 4 Series Height-Adjustable Suspension Upgrade - RWD, Non-Adaptive

Give your BMW 4 Series the stance and handling it deserves with this premium height-adjustable shock and spring package, engineered by KW Automotive for everyday road use and spirited driving. Expect sharper turn-in, reduced body roll, confident road holding and a clean, even drop that looks right on factory wheels or aftermarket alloys.

• Lowering range - Front: 40 to 65 mm
• Lowering range - Rear: 30 to 60 mm
• Axle load suitability - Front up to 950 kg
• Axle load suitability - Rear up to 1230 kg
• For rear-wheel drive models without factory adaptive damping

Why enthusiasts choose this setup

• Ride-height adjustment you can trust - Composite adjuster collar for precise on-car changes.
• Built by KW Automotive - Proven performance pedigree and consistent quality.
• Durability for UK roads - Zinc-plated struts with additional corrosion protection for long service life.
• Smooth, controlled dynamics - Dual-tube damper layout with matched spring rates for balance and stability.
• All-in-one solution - Springs, dampers, adjustable perches, bump stops and dust boots included.

Real-world results

We run this setup on customer cars and our own. Feedback is consistently positive: better composure over B-roads, a more planted feel in fast corners, and a purposeful drop that transforms the look without compromising day-to-day usability.

Compatibility

Designed for BMW 4 Series F3x chassis in rear-wheel drive form, without electronic damper control. Suitable for Coupe, Convertible and Gran Coupe variants where applicable. Always verify axle loads before purchase.

Key search terms

BMW 4 Series suspension upgrade, adjustable suspension kit, lowering suspension, ride height adjustable shocks, performance springs and dampers, stance kit, BMW F3x suspension, KW-built street suspension, height adjustable strut kit, BMW aftermarket suspension.

Professional fitting

Want it installed correctly the first time? Book professional fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote.