ST Lowering Spring Kit - 20/10 - 3 -series; E90, E91, E92, E93 (390L, 392C, 3C, 3K, 3L), Saloon 09/06-01/12 335i, 335d

ST Performance Coil Springs for BMW E9x 3 Series 335i 335d

Give your BMW E9x a lower, sharper and more purposeful stance while unlocking confident handling on British roads. These ST performance coil springs deliver a subtle ride height drop of approximately 20 mm at the front and 10 mm at the rear, striking the ideal balance between daily comfort and fast-road control.

Engineered specifically for the 3 Series platform, this kit suits the following models and codes:

• E90 Saloon 09/2006 to 01/2012
• E91 Touring
• E92 Coupe
• E93 Convertible
• Chassis identifiers 390L, 392C, 3C, 3K, 3L
• Petrol and diesel six-cylinder 335i and 335d applications

Why choose this suspension upgrade

• Lower centre of gravity for crisper turn-in and reduced body roll
• Improves cornering grip and high-speed stability without ruining ride quality
• Calibrated spring rates tailored to the E9x platform for predictable, confidence-inspiring feedback
• Works with factory dampers, including cars with electronic or adaptive shock absorbers
• OE-grade build with a corrosion-resistant protective finish for long service life
• High-tensile CrSi spring steel that is heat treated multiple times for strength and consistency
• Noise-damping sleeves used where required for a refined, rattle-free drive

Real-world results

We have fitted these springs on numerous customer cars and our own E9x builds. Feedback is consistently positive regarding the transformation in handling, the improved stance and the comfortable ride on UK tarmac. A proper upgrade for drivers who want a sporty feel without the harshness of overly aggressive setups.

Key specs and fitment details

• Ride height reduction front and rear: 20 mm front, 10 mm rear
• Supported engine output: 210 to 240 kW
• Maximum front axle load: 1090 kg
• Maximum rear axle load: 1135 kg

Perfect for

• BMW 3 Series enthusiasts seeking a stance upgrade and handling improvement
• Daily drivers who want better control and a tidy drop without sacrificing comfort
• Fast-road setups where precision and stability matter

Popular search terms

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Professional fitting

Want it installed right first time? Book professional fitting with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.