Performance M
STX Coilover Kit - 3-series (F30, F31); (3L, 3K) sedan; 2WD without electronic dampers max. allowed axle weight in kg Front: -950
STX Coilover Kit - 3-series (F30, F31); (3L, 3K) sedan; 2WD without electronic dampers max. allowed axle weight in kg Front: -950
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Unlock precision handling, a purposeful stance and everyday comfort for your BMW 3 Series F30 or F31 with this height adjustable suspension package engineered by KW Automotive for ST Suspension. Ideal for rear wheel drive saloon and touring models without factory adaptive damping, this kit delivers a serious drop with confidence-inspiring road manners.
Ride height adjustability lets you fine tune the drop for the look and performance you want:
Front adjustment range: 40 to 65 mm
Rear adjustment range: 30 to 60 mm
Axle load ratings for compatibility and safety:
Front up to 950 kg
Rear up to 1230 kg
Why upgrade your BMW F30 F31 suspension with this kit
- Sharpened turn in, reduced body roll and improved high speed stability
- Sporty, controlled ride quality that remains compliant on British roads
- Consistent damping performance thanks to quality internals and sealing
- Easy on-car height tweaks via a robust polyamide adjuster collar
Engineered for durability
- Galvanised damper bodies with an additional protective coating to resist corrosion
- Chrome plated piston rods for longevity
- Twin tube damper design with precision guidance and a comprehensive seal pack to keep dirt and moisture out
- Complete package with adjustable spring perches, performance springs, bump stops and dust boots
Real world results
We have installed numerous sets for customers and on our own cars. Feedback is consistently positive: tighter cornering, better traction out of bends and a clean, even drop that sets the car off perfectly. The combination of ride quality and control makes this kit a favourite for fast road and occasional track use.
Search friendly fitment and use cases
BMW F30 suspension upgrade. BMW F31 suspension kit. 3 Series saloon and touring coil over suspension for rear wheel drive cars without electronic damper control. Height adjustable shocks and springs for stance, lowering, track day, fast road, daily driving, show car drop, adjustable struts, performance suspension, BMW 3 Series RWD non EDC setup.
Compatibility notes
- For rear wheel drive models only
- Not compatible with cars fitted with factory adaptive dampers or EDC
- Confirm your vehicle’s axle weights do not exceed Front 950 kg and Rear 1230 kg
Professional installation
Want it fitted right first time? Book installation with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a tailored quote.
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