ST Suspensions Lowering Springs Kit 40/30mm for BMW E46 3 Series Convertible/Cabriolet 318Ci (2000-2004) Sport Drop Coil Springs, Front 40mm Rear 30mm – Chassis 346L/346C/346R/346K

Transform your BMW E46 cabrio with a precise height drop and sharper road feel

Give your open-top 3 Series a purposeful stance and confident cornering with these ST performance coils. Designed specifically for the BMW 3 Series E46 soft-top 318 Ci, this spring set delivers a balanced front and rear height reduction for a cleaner wheel arch line, reduced body movement and a more planted, sporty drive without spoiling everyday comfort.

Perfect fitment for the E46 convertible 318 Ci

• Model suitability: BMW 3 Series E46 cabrio 318 Ci, 2000 to 2004 production years - ideal for 2000, 2001, 2002, 2003, 2004 registrations
• Chassis codes: 346L, 346C, 346R, 346K
• Engine output range: 87 to 110 kW
• Front and rear ride-height reduction: 40 mm front, 30 mm rear
• Maximum axle loads: up to 895 kg front, up to 1190 kg rear

Why enthusiasts choose these ST coils for the E46 cabrio

• Crisp turn-in and reduced roll thanks to tuned rates engineered for this specific BMW platform
• Even, road-hugging stance that clears arch gap for better wheel fitment and a cleaner silhouette
• Works seamlessly with factory dampers, including cars fitted with electronic damping systems
• Factory-grade manufacturing from chrome silicon spring steel for strength and consistency
• Multi-stage heat treatment for long-term performance retention
• Epoxy powder-coated finish for corrosion resistance and durability in UK conditions
• Sleeved sections in key areas for refinement

Real-world results

We run these on customer E46 cabrios in our workshop and the feedback is exactly what you want: a confident, planted feel, cleaner wheel arch finish and a smarter, sportier look that suits the 318 Ci perfectly.

Compatibility notes

Please confirm your vehicle’s axle weights and power output fall within the ranges listed above before ordering. Designed to be used with standard shock absorbers, including vehicles equipped with electronic dampers.

Professional installation available

Want it fitted properly first time? Book installation with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and availability.

Search-friendly fitment and upgrade terms

BMW E46 3 Series cabrio suspension upgrade, 318 Ci convertible drop springs, coil springs kit, ride height reduction, stance improvement, handling upgrade, arch gap reduction, sport suspension for BMW 3 Series soft-top, E46 convertible springs UK.