ST Suspensions ST X Coilover Kit for 2006-2013 BMW 325i, 328i, 330i, & 335d (E90/E92) - 13220032

Fits select 2006-2013 BMW 325i, 328i, 330i, and 335d (E90 Sedan / E92 Coupe).

The ST Suspensions ST X Coilover kit is engineered for drivers who demand improved cornering performance without sacrificing daily driveability. Leveraging world-class damping technology from KW Automotive, these coilovers feature vehicle-specific spring rates and damper valving to ensure a balanced, sporty ride. Each strut housing is constructed from galvanized zinc-plated steel for maximum corrosion resistance, paired with a friction-optimized polyamide composite spring perch with a stainless steel insert to prevent oxidation and ensure long-lasting height adjustability.

Every ST X kit is hand-assembled in Fichtenberg, Germany, and verified on a shock dyno to ensure consistent performance. The system utilizes a hardened chrome piston rod, a multi-layered pressure-resistant sealing package, and a mono-block guide system to maintain integrity under high-load conditions while protecting internal valve packs from dirt and particulates.

• Precision Engineering: Dampers and spring rates tuned specifically for the BMW E90 and E92 chassis.
• Seamless Height Adjustment: Features a unique trapezoidal thread pitch and composite perches for easy ride height tuning.
• Corrosion Resistance: Galvanized steel housings and composite perches prevent seizing and oxidation.
• High-Grade Components: Hardened chrome piston rods and resilient elastomer bump stops with integrated dust protection.
• Quality Tested: Hand-built by KW and shock-dyno tested before packaging.
• Manufacturer Part Number: 13220032
• Warranty: 5-Year Limited Warranty (Unlimited Mileage)