Product details
OVERVIEW
The ST XA coilover kit for the E89 Z4 roadster lowers the car on a threaded, height-adjustable strut and adds 18-click rebound damping adjustment.
ST is the value brand of KW Automotive, and every ST coilover is built at KW in Germany on galvanized steel strut housings sealed against corrosion, with a continuous thread so ride height can be set with the kit installed. The ST XA adds KW twin-tube dampers with 18 clicks of rebound adjustment, set at the top of the piston rod, so the same kit can be run softer for the street or firmer for a track day.
SPECS
- Damper family: ST XA (height adjustable, rebound adjustable)
- Damping adjustment: 18 clicks of rebound
- Damper design: KW twin-tube, monoblock guide and multi-lip seal package
- Strut material and finish: galvanized steel with additional coating
- Warranty: 5-year limited, unlimited mileage
PARTS INCLUDED
- Front and rear coilover struts or dampers with ST springs, adjustable spring perches and elastomer bump stops with dust boots
- Spanner wrench for ride-height adjustment
- Damping adjustment tool
- 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 listed by ST for the four-cylinder Z4 sDrive28i (N20).
- Vehicle-specific installation instructions for ST 18220072 ship in the box with the kit.
- Speed Logic offers professional installation and alignment: request an appointment.
PART NUMBER
- 18220072
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 |