ST Suspensions Lowering Springs Kit 30/20mm for BMW 3 Series E90 E91 E92 E93 (E9x) 2005-2012 – Sport Coil Spring Set, Drop Kit for Saloon/Sedan, Touring/Wagon, Coupe, Convertible – Fits 316d 318d 320d 323i 325i 328i 330i – Adaptive Damper Compatible

Transform your BMW 3 Series ride and stance

Give your E9x platform a sharper look and a more planted feel with this ST sport spring set delivering a drop of approximately 30 mm at the front and 20 mm at the rear. Engineered by the suspension experts behind KW, these uprated coils are designed to work seamlessly with factory dampers, including models equipped with electronic/adaptive shock absorbers.

Why enthusiasts choose this spring upgrade

• Real-world handling improvement with flatter cornering and crisper turn-in
• Reduce arch gap for a purposeful, even stance without ruining daily comfort
• OE-grade build quality for long service life
• Works with standard and adaptive dampers for easy install
• Consistent ride height and performance thanks to vehicle-specific rates

Key construction features

• Chromium-silicon spring steel for strength and durability
• Multiple heat treatments for stability under repeated loads
• Protective epoxy coating for corrosion resistance
• Sleeved where required for quiet, refined operation
• Application-specific spring rates tuned for the E9x chassis

Lowering and technical data

• Approximate drop F/R: 30 mm / 20 mm
• Suitable power range: 85–190 kW
• Maximum front axle load: up to 1045 kg
• Maximum rear axle load: up to 1135 kg
• Compatible with vehicles fitted with electronic/adaptive dampers

Fitment coverage

Designed for the BMW 3 Series E9x platform, including saloon, estate, coupé and cabriolet (E90, E91, E92, E93) across applicable 2005–2012 models. Suits selected diesel and petrol variants such as 316d, 318d, 320d, 323i, 325i, 328i and 330i. Always verify against axle loads and your specific model before ordering.

What you will feel

• More confidence on B-roads and motorway slip roads with reduced body roll
• A neater, level look that complements OEM and aftermarket wheels
• Balanced ride quality suitable for daily driving and fast-road use

Proven by us and our customers

We run these springs on customer cars and have had consistently positive feedback on ride, stance and longevity. It is a cost-effective suspension upgrade that genuinely enhances the E9x driving experience.

Fitting and setup

Professional installation and a four-wheel alignment are strongly recommended after lowering. For fitting, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Search-friendly terms for easy finding

BMW 3 Series suspension upgrade, E9x sport springs, coil spring set, fast road springs, stance and handling, front 30 mm rear 20 mm drop, BMW saloon touring coupe convertible suspension, adaptive damper compatible springs, chromium-silicon springs, OE quality lowering.