ST X Coilovers for BMW 3 Series F30 F31 F34 (2012-2019) - Height Adjustable Coilover Suspension/Lowering Kit - Shocks & Springs, Drop 30-55mm Front 15-40mm Rear - RWD & xDrive AWD - KW Engineered - F3x Saloon/Sedan Touring Estate Gran Turismo GT

ST X height-adjustable suspension for BMW 3 Series F30 Saloon, F31 Touring, F34 Gran Turismo

Give your 3 Series the stance, grip and confidence it deserves. The ST X system, developed with KW Automotive, is a premium spring and damper package for F3x chassis cars from 2012 to 2019, covering both rear-drive and xDrive all-wheel drive models. Expect tighter turn-in, flatter cornering and a smooth, controlled ride on UK roads, plus easy ride-height tuning for perfect wheel fitment and a purposeful drop.

Lowering capability
Front drop: 30 to 55 mm
Rear drop: 15 to 40 mm

Why this upgrade stands out

• Ride-height tuning with a continuous threaded body for precise stance and clearance
• KW know-how built in for balanced road handling and everyday comfort
• Twin-tube dampers with chrome-plated piston rods for long-term durability
• Galvanised strut housings with additional corrosion protection for year-round use
• Polyamide adjuster perches for smooth, accurate height changes
• Sealed guide package helps keep grit and moisture out in all conditions
• Sharpened steering response and reduced body movement without harshness

What you receive

• Front and rear ride-height adjustable struts within the tested range
• Performance springs and adjustable spring seats
• Matched bump stops and dust boots
• Ready-to-install suspension kit for BMW F30, F31 and F34 platforms

Real-world feedback
We have fitted this kit to multiple F3x cars at MJ Modifications and owners consistently report a more planted, predictable chassis with improved road feel and a clean, even ride quality. The ability to fine-tune the drop for wheels and tyres makes dialling in the perfect look straightforward.

Compatibility notes

• Suitable for two-wheel drive and xDrive all-wheel drive models
• Not compatible with factory electronic damper control
• Selection may vary by model year and axle load category
• Please check the VIN plate for maximum axle loads. The third and fourth numbers typically indicate front and rear ratings
• If unsure, contact us and we will help you confirm the correct setup for your chassis and axle weights

Professional installation
For expert fitting and alignment, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

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