Product details
OVERVIEW
The ST X coilover kit for the E89 Z4 roadster replaces the factory struts and springs with a height-adjustable coilover set for a lower stance and firmer body control.
ST is the value brand of KW Automotive, and every ST coilover is built by hand at KW in Fichtenberg, Germany. The ST X is the entry point in the coilover range: a fixed-damping, height-adjustable kit built on galvanized zinc-coated steel struts with a friction-optimized composite spring perch and stainless steel insert.
SPECS
- Damper family: ST X (height adjustable, fixed damping)
- Damping adjustment: none (fixed valving)
- Strut material and finish: galvanized zinc-coated steel
- Spring perch: friction-optimized composite with stainless steel insert
- Warranty: 5-year limited, unlimited mileage
PARTS INCLUDED
- Front and rear coilover struts with ST springs
- Spanner wrench for ride-height adjustment
- Installation documentation and technical component report
TECH RESOURCES
- Required: four-wheel alignment after installation and after any ride-height change.
- Required: professional installation with spring compressors and strut service tools.
- Not for cars with Electronic Damping Control (EDC).
- Not listed by ST for the four-cylinder Z4 sDrive28i (N20).
- Vehicle-specific installation instructions for ST 13220072 ship in the box with the kit.
- Speed Logic offers professional installation and alignment: request an appointment.
PART NUMBER
- 13220072
VEHICLE APPLICATIONS
| Make | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| BMW | Z4 sDrive30i | E89 | N52 3.0L I6 | 2009–2011 |
| BMW | Z4 sDrive35i | E89 | N54 3.0L Twin-Turbo I6 | 2009–2016 |
| BMW | Z4 sDrive35is | E89 | N54 3.0L Twin-Turbo I6 | 2011–2016 |