ST Lowering Spring Kit - 30/30 - 3 -series; E90, E91, E92, E93 (390L, 392C, 3C, 3K, 3L), coupe 06/06- 318i, 320i, 323i, 325i, 330i, 320d

BMW 3 Series E9x Sport Spring Set - Precision ride height drop and sharper handling

Give your E9x chassis a purposeful stance and a confident, planted feel with this premium sport spring set. Designed specifically for the BMW 3 Series platform, this upgrade delivers a balanced ride height reduction of approximately 30 mm front and rear for a cleaner look, tighter turn-in and reduced body roll, without ruining day-to-day comfort.

Perfect for drivers who want a serious suspension upgrade without moving to coilovers, these performance coil springs work seamlessly with factory shock absorbers, including cars equipped with adaptive damping. Expect OEM-like refinement with a more controlled, sporty response on B-roads and motorways alike.

Why enthusiasts choose these springs

• Ride height reduction of 30 mm front and 30 mm rear for a crisp, even drop
• Vehicle-specific spring rates for the E9x platform for predictable handling
• OEM-grade manufacturing for a precise fit and quiet operation
• Epoxy coated for corrosion resistance and long-term durability
• Chrome-silicon steel construction, multiply tempered for strength and consistency
• Compatible with cars running factory adaptive dampers
• Partly tubed for added protection and reduced noise where required

Key specifications

• Front axle load up to 930 kg
• Rear axle load up to 1090 kg
• Supported engine output: 95 to 200 kW
• Lowering: 30 mm front and 30 mm rear

Confirmed fitment

BMW 3 Series E9x platform across Saloon, Touring, Coupé and Convertible body styles:

• E90 Saloon
• E91 Touring
• E92 Coupé
• E93 Convertible

Engine variants: 318i, 320i, 323i, 325i, 330i, 320d. BMW internal references include 390L, 392C, 3C, 3K, 3L. Coupé fitment from 06/2006 onward.

Please verify your axle loads against the figures above before ordering.

Real-world results

We run these on our own cars and our customers consistently report a tighter, more responsive feel with excellent everyday comfort. The even 30 mm drop transforms the look, improving wheel fitment and reducing arch gap while maintaining drivability.

Ideal searches and use cases

BMW suspension upgrade for E90, E91, E92, E93. Lowering springs for BMW 3 Series. E9x sport springs. Performance springs for daily driving and spirited road use. Stance improvement with factory shock compatibility. Affordable alternative to coilovers. Handling upgrade for petrol and diesel models. Ride height drop for Saloon, Touring, Coupé, Convertible.

Professional fitting

Want it installed right first time? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

Note: No additional parts are included beyond the spring set. Wheel alignment is recommended after installation.