The ST X coilover kit delivers application-specific ride-height adjustment for the BMW F3x 3-Series and 4-Series. Dampers are engineered and built by hand at KW in Germany and shock-dyno tested, with fixed valving tuned per application for everyday road comfort and sharper handling. A galvanized zinc-coated steel housing and friction-optimized polyamide composite spring perch with a stainless-steel insert resist corrosion for long-lasting height adjustability.
| Type | Coilover kit (ST X) |
| Adjustability | Ride height |
| Damping | Fixed |
| Construction | Galvanized zinc-coated steel, monotube |
| Warranty | 5-year limited, unlimited mileage |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2014-2018 | BMW | 320i | Base |
| 2014-2018 | BMW | 328d | Base |
| 2018 | BMW | 328d xDrive | Base |
| 2014-2016 | BMW | 328i | Base |
| 2016,2018 | BMW | 330e | Base |
| 2017 | BMW | 330e | iPerformance |
| 2017-2018 | BMW | 330i | Base |
| 2014-2015 | BMW | 335i | Base |
| 2016-2018 | BMW | 340i | Base |
| 2014-2016 | BMW | 428i | Base |
| 2015-2016 | BMW | 428i Gran Coupe | Base |
| 2017-2020 | BMW | 430i | Base |
| 2017-2020 | BMW | 430i Gran Coupe | Base |
| 2014-2016 | BMW | 435i | Base |
| 2015-2016 | BMW | 435i Gran Coupe | Base |
| 2017-2020 | BMW | 440i | Base |
| 2017-2020 | BMW | 440i Gran Coupe | Base |
