ST Sport Suspension Kit - 40/30 - 3 -series; E46 (346L/C/R/K) Cabriolet / convertible 04/00-12/04 320Ci, 323Ci, 325Ci, 330Ci, 320Cd

Transform the way your BMW 3 Series E46 cabriolet drives with this ST sport shock and spring package. Ideal for fast-road use and daily driving, this matched damper and coil set delivers a confident ride height drop of 40 mm front and 30 mm rear for a purposeful stance, sharper turn-in and flatter cornering. If you want a genuine handling upgrade for your E46 soft-top without ruining comfort, this is the proven solution.

We run this setup on our own builds and customer cars, and the feedback is consistently excellent. Expect tighter body control, better stability over bumpy British roads and a composed ride that makes your convertible feel more connected, not crashy.

Why choose this ST suspension package

• Balanced drop for the perfect street stance - approx. 40 mm front and 30 mm rear
• Progressive-rate springs for everyday comfort with strong support in corners
• Twin-tube dampers with vehicle-specific valving for confidence on UK roads
• High-strength spring steel with multi-layer coating and final epoxy finish for corrosion resistance
• OEM-quality materials and durability for long-term reliability

Compatible vehicles

Designed for the BMW E46 convertible body style built 04/2000 to 12/2004, including:

• 320Ci petrol
• 323Ci petrol
• 325Ci petrol
• 330Ci petrol
• 320Cd diesel

Chassis codes: 346L, 346C, 346R, 346K. Perfect for owners searching for E46 cabrio lowering kit, shock and spring kit, handling upgrade, stance improvement or sport suspension for BMW 3 Series convertible.

Technical details

• Lowering front and rear: 40 mm front, 30 mm rear
• Engine power range: 100 to 170 kW
• Maximum front axle load: up to 970 kg
• Maximum rear axle load: up to 1190 kg
• Damper design: temperature-resistant twin-tube with fixed, model-specific valving
• Spring design: progressive-rate coils, high-strength steel, multi-coated with epoxy top coat

What you get

• Matched sport dampers and progressive springs for both axles
• A factory-style, bolt-on upgrade that improves grip, steering response and high-speed stability

Perfect for

• BMW E46 cabrio owners wanting a quality lowering kit without going full coilover
• Fast road driving, weekend fun and daily commute comfort
• Reducing wheel arch gap for a cleaner stance while keeping ride quality

Fitting and advice

Professional installation and alignment recommended. For fitting, choose MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk. We are happy to advise on setup, geometry and wheel and tyre fitment for your E46 convertible.

Why buy from us

• Tried and tested on our own cars and customer builds
• Great feedback on ride quality, cornering grip and road holding
• Expert support from enthusiasts who know the E46 platform

Searching for BMW E46 cabrio sport shocks, E46 convertible spring and damper kit, 3 Series soft-top suspension upgrade, lowering springs and shocks for 320Ci, 323Ci, 325Ci, 330Ci or 320Cd? This ST setup delivers the performance, comfort and stance you want with OEM-grade reliability.