The ST X coilover kit is a ride-height-adjustable suspension system engineered by ST suspensions and hand-built by KW in Fichtenberg, Germany for the 2007-2013 BMW 328i. Galvanized zinc-coated steel struts and a friction-optimized polyamide composite spring perch with a stainless-steel insert resist corrosion for long-lasting height adjustability, while an elastomer bump stop with an integrated dust protection system shields the hardened chrome piston rod. Dampers and spring rates are tuned specifically for this application to balance sporty handling with everyday road comfort, and each unit is shock-dyno tested before shipping.
| Type | Coilover kit (ST X) |
| Adjustability | Ride height |
| Damping | Fixed |
| Construction | Galvanized zinc-coated steel strut; polyamide composite spring perch with stainless-steel insert |
| Warranty | 5-year limited, unlimited mileage |
| Origin | Made in Germany |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2007-2013 | BMW | 328i | Base |
