ST Lowering Spring Kit - 30/30 - 4 -series; F32, F33 (3C) (4WD) coupe 10/13- 420i xDrive, 428i xDrive, 420d xDrive

Give your BMW 4 Series the stance and handling it deserves. ST sport springs deliver a precise 30 mm drop front and rear for a lower centre of gravity, cleaner wheel arch fitment and sharper road feel. Built to work perfectly with your factory dampers, including cars with electronic control, this is a proven suspension upgrade that tightens body control while keeping daily comfort intact.

Why choose these performance springs

• 30 mm front and 30 mm rear ride height reduction for a purposeful, even drop
• Noticeably flatter cornering, reduced dive and squat, improved steering response
• Engineered spring rates tailored to the vehicle for balanced road manners
• High tensile chrome silicon steel, heat treated and shot peened for durability
• Hard wearing epoxy powder finish for excellent corrosion resistance
• Manufactured to OEM-level standards for long term reliability
• Compatible with factory electronic dampers and adaptive suspension systems

Vehicle compatibility

• BMW 4 Series F32 and F33 with all wheel drive xDrive
• Models: 420i xDrive, 428i xDrive, 420d xDrive
• Production from 10/2013 onward
• Power range: 135 to 180 kW
• Maximum axle loads: Front up to 980 kg, Rear up to 1120 kg

Lowering specs

• Front drop: 30 mm
• Rear drop: 30 mm

Real-world results

We have installed these on customer cars and in our own builds, and the feedback is consistently positive. Better grip, tidier stance and confident high speed stability without the harshness of a full coilover. A quality upgrade for fast road use and daily driving.

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Fitting service

Professional installation recommended. Book fitting with MJ Modifications in Warwickshire. For a quote email info@mjmodifications.co.uk.

Please verify your vehicle’s axle loads and specification before ordering to ensure correct fitment.