ST Lowering Spring Kit - 20/10 - 4 -series; F32, F33 (3C) Cabriolet / convertible 02/14- 428i, 420d

Sharper handling and a perfect stance for your BMW 4 Series F32 and F33

Give your BMW the road presence and precision it deserves with ST sport springs. This performance spring set delivers a measured ride height drop of 20 mm at the front and 10 mm at the rear, enhancing cornering grip, reducing body roll and tightening steering response while keeping everyday comfort intact. Designed to work with the factory dampers, including vehicles with electronic/adaptive damping, it is a direct-fit upgrade for genuine OEM-style reliability.

Crafted from high‑grade chrome‑silicon steel and epoxy coated for durability, these springs are engineered specifically for this chassis with vehicle‑matched rates. We run these on our own builds and customers consistently report a more planted feel, improved stability at speed and a cleaner, level stance without harshness.

Why choose this performance spring set

• Clean, even ride height reduction: approximately 20 mm front and 10 mm rear
• Enhances handling, turn‑in and high‑speed stability while maintaining daily usability
• OEM‑grade fit and finish for a straightforward install on standard shocks
• Compatible with adaptive/electronic damping systems
• Chrome‑silicon steel, multiply tempered for strength and longevity
• Epoxy coated for corrosion resistance
• Vehicle‑specific spring rates, partly tubed where required

Compatibility and key specifications

• Chassis: BMW 4 Series F32 coupe and F33 cabriolet from 02/2014 onward
• Engines: 428i petrol and 420d diesel
• Power range: 135 to 180 kW
• Maximum axle loads: front up to 965 kg, rear up to 1230 kg
• Lowering: approx. 20 mm front, 10 mm rear

Search terms customers use for this upgrade: BMW 4 Series suspension upgrade, F32 F33 drop springs, sport springs for BMW 428i 420d, ride height reduction kit, BMW cabriolet springs, handling upgrade, stance springs, coil spring kit, adaptive damper compatible springs, UK performance suspension.

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. For a fitting quote or booking, email info@mjmodifications.co.uk.

Note: Always verify your vehicle’s axle weights and model details against the specifications above before purchase.