ST Lowering Spring Kit - 30/30 - 3 -series; E90, E91, E92, E93 (390L, 392C, 3C, 3K, 3L), Cabriolet / convertible 03/07- 323i, 325i, 330i, 335i

Performance lowering coils for BMW E9x 3 Series - precise stance, sharper handling, everyday comfort

Give your BMW E9x the look and road feel it deserves with this ST sport spring set. Expect a clean 30 mm drop front and rear for a level stance, tighter body control and confidence on B-roads without ruining daily drivability. Designed to work with factory shock absorbers including cars with electronic damping, these performance coils deliver a proper suspension upgrade for drivers who want both style and substance.

Fitment - BMW 3 Series E9x petrol models

Compatible with the following chassis and engines:

• E90 saloon, E91 touring, E92 coupé, E93 cabriolet
• 323i, 325i, 330i, 335i
• Cabriolet from 03/2007 onwards
• Chassis references: 390L, 392C, 3C, 3K, 3L

Why enthusiasts choose these sports springs

• 30 mm front and 30 mm rear drop - balanced ride height for a purposeful stance
• Noticeably reduced body roll - quicker turn in and improved cornering grip
• Works with standard dampers - including adaptive and electronic systems
• OEM-level build - epoxy coated finish for corrosion resistance
• Chrome-silicon steel construction - multiply tempered for durability
• Vehicle-specific spring rate - tuned for E9x chassis compliance and control
• Partly tubed design - consistent performance and longevity

Technical details

• Lowering amount front and rear: 30 mm / 30 mm
• Supported engine output: 130 to 240 kW
• Maximum front axle load: 990 kg
• Maximum rear axle load: 1200 kg

Real-world results

We have installed these ST sport springs on multiple customer cars and our own builds. Feedback is consistently positive - better stability, more planted feel, and a clean drop that sits perfectly on OEM wheels or aftermarket alloys. A genuine upgrade for road use, fast road and the occasional track day.

Search-friendly terms customers use

BMW 3 Series suspension upgrade, E90 lowering springs, E92 sport coils, E93 cabrio lowering kit, BMW 335i coil springs, 30 mm drop springs, stance kit for BMW, performance suspension for E9x, BMW 323i 325i 330i 335i springs, saloon touring coupe cabrio suspension.

Fitting and setup

Professional installation available at MJ Modifications, Warwickshire. Email info@mjmodifications.co.uk for a fitting quote. We recommend a four-wheel alignment after installation to optimise geometry, tyre wear and handling.

Notes

• Ensure your vehicle meets the axle load limits listed above
• Designed to work with standard dampers, including models with electronic damping