BMW 540i Coilover Suspension Kit - Front + Rear - Dinan - DIN CSS - 17-23. A Dinan-engineered coil spring set for the G30 540i (RWD) that sharpens handling while preserving daily drivability.

The DIN CSS system uses CNC-wound, high-tensile chrome-silicon springs that are shot-peened and preset for long-term consistency. Lowering approximately 7/8 in front and rear refines suspension geometry and trims body motion, while an approximate 15% rate increase curbs dive under braking and squat under acceleration. Compatible with conventional or factory electronic shocks. For optimal ride quality and the advertised drop, Dinan recommends pairing with the matching Ride Quality and Handling Kit.

Features

• Approx. 0.875 in drop front and rear (G30 540i RWD)
• ~15% spring rate increase front and rear
• CNC-wound chrome-silicon; shot-peened; preset to resist sag
• Notable reduction in body roll; quicker steering response
• Works with OE and factory electronic shocks
• Recommended with Dinan Ride Quality and Handling Kit
• Not compatible with xDrive models

Questions or fitment checks? Call our experts. We offer professional installation and customization at our Austin, TX and Los Angeles, CA area facilities: 512-982-9393 (TX), 562-981-6800 (CA).

If you are considering multiple items, contact us for potential shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov