ST Suspensions Lowering Springs Kit 40/30mm for BMW 3 Series E46 Convertible/Cabriolet (2000-2004) - Sport Coil Springs Drop Set for 320Ci 323Ci 325Ci 330Ci 320Cd - 346L/346C/346R/346K

Transform your BMW E46 drop-top with ST performance coil springs

Give your 3 Series cabrio the stance and handling it deserves. This ST sport spring set is a direct-fit suspension upgrade for BMW E46 convertible models from 04/2000 to 12/2004, including 320Ci, 323Ci, 325Ci, 330Ci and 320Cd. Chassis codes: 346L, 346C, 346R, 346K. Power range supported: 100 to 170 kW.

Engineered to work perfectly with your factory shock absorbers, these precision-wound coils deliver a meaningful ride height reduction while maintaining everyday comfort. Expect a sharper turn-in, reduced body roll and a cleaner, more purposeful look without compromising road manners.

• Approximate ride height change: 40 mm front and 30 mm rear for a balanced, aggressive stance
• Optimised, vehicle-specific spring rates for confident cornering and stable high-speed composure
• High-tensile chrome-silicon steel construction with multi-stage tempering for long-term durability
• OEM-level manufacturing standards for a precise, quiet fit
• Hard-wearing epoxy powder coat for excellent corrosion resistance
• Partly tubed for OE-style seating on spring perches
• Designed to be used with standard dampers and original top mounts

Why choose this upgrade

We have installed these on our own builds and customer vehicles, and the feedback is consistently positive: tighter steering response, flatter cornering and a sleek, even drop that really suits the E46 cabriolet body. If you are searching for a quality, hassle-free suspension refresh that improves both looks and performance, this is the one.

Fitment and specifications

• Compatible vehicles: BMW 3 Series E46 Cabriolet and Convertible 2000–2004 including 320Ci, 323Ci, 325Ci, 330Ci, 320Cd
• Front axle weight limit: up to 970 kg
• Rear axle weight limit: up to 1190 kg
• Intended lowering: 40 mm front, 30 mm rear
• Works with standard suspension components

Notes: Always verify your actual axle loads before purchase. A full four-wheel alignment is recommended after installation. Springs may settle slightly after initial mileage.

Professional installation

Want them fitted properly the first time? Book in with MJ Modifications in Warwickshire for expert installation and alignment advice. Email info@mjmodifications.co.uk for a fitting quote.

If you are searching for BMW E46 convertible sport springs, suspension lowering kit, coil spring set, drop springs for 3 Series cabrio, ride height reduction, handling upgrade for 320Ci 323Ci 325Ci 330Ci 320Cd, or ST performance springs for E46, this product is the perfect match.