The ST X height-adjustable coilover kit delivers sporty, everyday handling for the BMW E90 (325i, 328i, 330i and 335d). Each kit is application-specific with fixed-rate dampers and spring rates tuned by ST's vehicle dynamics engineers in Germany, and is built by hand and shock-dyno tested by KW in Fichtenberg. Galvanized zinc-coated steel struts, a friction-optimized polyamide composite spring perch with a stainless-steel insert, and an integrated dust-protection system maximize corrosion resistance and long-lasting ride-height adjustability.
| Type | Coilover kit (ST X) |
| Adjustability | Ride height |
| Damping | Fixed |
| Construction | Galvanized zinc-coated steel struts |
| Warranty | 5-year limited, unlimited mileage |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2006 | BMW | 325i | Base |
| 2007-2013 | BMW | 328i | Base |
| 2006 | BMW | 330i | Base |
| 2009-2011 | BMW | 335d | Base |
