ST Lowering Spring Kit - 30/20 - 6- series; F06, F12, 13 (6C) Cabriolet / convertible 03/11- 640i, 635d, 640d

Sharper stance, better control, everyday comfort

Give your BMW 6 Series the drop it deserves with this premium ST sport spring set. Expect a purposeful ride height reduction and a noticeable improvement in turn-in, body control and road presence, all while retaining day-to-day comfort on British roads. Ideal for enthusiasts who want a clean, level stance and a responsive chassis without switching to coilovers.

Compatible models

Engineered for the BMW 6 Series F-platform:

• F06 Gran Coupé
• F12 Convertible
• F13 Coupé

Suitable for 640i petrol, 635d and 640d diesel models from 03/2011 onward, including cars with factory adaptive damping.

Lowering and key specs

• Approximate drop front and rear: 30 mm front, 20 mm rear
• Maximum front axle load: 1140 kg
• Maximum rear axle load: 1330 kg
• Engine output range supported: 230 to 235 kW variants

Why choose these performance springs

• Tailored chassis tuning for BMW 6 Series F06, F12, F13 for a balanced front to rear rake and confident cornering
• Works seamlessly with original dampers, including vehicles fitted with electronic or adaptive suspension
• Chrome-silicon spring steel, multiply tempered for long-term strength and consistent rate
• Epoxy coated for corrosion resistance and durability in UK conditions
• Vehicle-specific rates for precise handling without harshness
• Partly tubed in contact areas to reduce noise and protect finishes
• OEM-level manufacturing quality for a direct-fit installation

Real results our customers love

We have installed these on customer cars in-house and feedback has been consistently positive. Owners report a tighter, more planted feel, reduced roll through fast bends and a tasteful, even drop that complements factory wheels or aftermarket fitments. It is the ideal suspension upgrade for a sportier look and improved road holding without compromising daily drivability.

What you get

• Front and rear sport springs designed for the listed BMW applications
• Comprehensive fitment guidance and support from our team

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and lead times.

Helpful notes

• Please verify your vehicle’s axle weights on the VIN plate to ensure compatibility with the stated limits
• Intended for use with standard length dampers in good condition, including vehicles with adaptive damping systems

Searching for BMW 6 Series lowering springs, drop springs, sport springs, suspension upgrade, ride height reduction 30 mm 20 mm, F06 F12 F13 suspension, Gran Coupé suspension kit, Convertible spring set, Coupé handling upgrade, 640i 640d 635d suspension? This ST spring kit delivers the look, handling and quality you want.