ST Lowering Spring Kit - 20/10 - 4 -series; F32, F33 (3C) Grand coupe 05/14- 420i, 428i, 418d, 420d

BMW 4 Series F32 F33 Gran Coupe 2014-on performance drop springs – 20 mm front, 10 mm rear

Give your BMW 4 Series the stance and road holding it deserves with this premium set of performance springs from ST. Designed to work seamlessly with your factory dampers, these precision-wound coils deliver a tasteful ride height reduction for a sharper, more planted drive without ruining everyday comfort.

Perfect fitment for petrol and diesel models including 418d, 420d, 420i and 428i built from 05/2014 onward. Ideal for owners wanting improved handling, reduced body roll and a purposeful look on coupe, convertible and Gran Coupe variants.

Key specifications

• Ride height reduction: approx. 20 mm front and 10 mm rear
• Engine output supported: 105 to 180 kW
• Maximum front axle load: up to 970 kg
• Maximum rear axle load: up to 1230 kg
• Compatible with vehicles equipped with electronic or adaptive damping systems

Why enthusiasts choose these springs

• Transforms cornering confidence with reduced body roll and crisper turn-in
• Retains daily comfort while tightening up the chassis for fast-road use
• Vehicle-specific spring rates for balanced handling on real UK roads
• OEM-level build quality for long-term reliability
• Corrosion-resistant epoxy coating for durability through British winters
• Manufactured from high-grade chrome-silicon steel and tempered multiple times
• Partly tubed where required for noise reduction and smooth operation
• Clean, even drop that enhances wheel fitment and tyre-to-arch aesthetics

Real-world results

We have fitted and run these on customer cars and the feedback is consistently positive. Tighter, more responsive steering, greater stability at speed and a subtle, premium drop that looks right without compromising drivability.

Compatibility and fitment notes

• For BMW 4 Series F32 coupe, F33 cabriolet and Gran Coupe models from 05/2014 onward with 418d, 420d, 420i and 428i engines
• Ensure your vehicle’s axle loads and engine output fall within the limits listed above
• Designed to work with factory dampers including adaptive setups

Professional installation available

Want it fitted properly the first time? Book professional installation with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Upgrade your 4 Series with a tasteful drop, improved grip and confidence-inspiring handling. Order your ST performance springs today and enjoy a smarter stance and a more engaging drive.