ST Suspensions X-A Coilover Suspension Kit for BMW 3 Series E90 E91 E93 (E9x) 09/2005-on – Height & Rebound Adjustable, Lowering Kit, Adjustable Shocks & Springs – Saloon, Touring Estate, Cabriolet – KW Engineered, TUV Tested

Transform your BMW 3 Series handling and stance with ST X-A adjustable suspension

Looking to sharpen steering feel, reduce body roll and achieve the perfect ride height on the road or your next track session? This ST X-A height-adjustable shock and spring package is a premium performance suspension upgrade for BMW 3 Series E9x models, delivering precise damping control and a wide lowering range for a true road and performance setup.

Developed in partnership with KW Automotive, the kit uses twin-tube dampers with top-mounted rebound adjusters, letting you quickly fine-tune firmness for comfort on the commute or extra support for spirited driving. We have fitted these kits for customers and on our own cars, and the feedback is consistently outstanding: tighter cornering, better stability, improved traction and a more confidence-inspiring drive without ruining day-to-day comfort.

Key benefits

• Rebound adjustable dampers via an easy-access top dial for fast, tool-free fine-tuning
• Height adjustable front and rear for dialled-in stance and performance balance
• Noticeably flatter cornering, sharper turn-in and enhanced road holding
• Comfort to sport in seconds – perfect for daily driving, fast road and occasional track days
• Galvanised struts with additional coating for excellent corrosion resistance in UK weather
• Reduced internal friction for consistent damping performance and long service life
• TUV-tested adjustment range for peace of mind

Adjustment range and axle loads

• Front lowering: 30 to 60 mm
• Rear lowering: 20 to 50 mm
• Maximum axle load: Front up to 1090 kg, Rear up to 1200 kg

What you get

• Front and rear height-adjustable dampers and matched performance springs
• Adjustable spring perches with continuous thread
• Bump stops and dust protection sleeves
• Comprehensive installation hardware and instructions

Fitment

For BMW 3 Series E9x platforms from 09/2005 onward:

• E90 saloon
• E91 Touring estate
• E93 cabriolet

Type codes covered: 390L, 392C, 3L, 3K, 3C. Always verify axle loads and model details before ordering.

Why choose this upgrade

This coil over suspension kit is a proven bolt-on solution for BMW owners seeking a serious suspension upgrade without sacrificing everyday usability. With rebound tuning at the top of the piston rod and a broad ride-height window, you can tailor handling, ride quality and stance to your preference. The KW-engineered damper internals and high-quality sealing ensure durability through all seasons, while the included spring system and protective components keep performance consistent.

Installation and setup

Professional fitting and four-wheel alignment are strongly recommended to maximise performance and tyre life. Book expert installation with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and setup advice.

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