The ST XA coilover kit for the Audi A4 and A4 Quattro (8E/B6-B7) combines a wide range of ride-height adjustment with 16-click adjustable rebound damping, letting you dial in both stance and driving dynamics. Each kit uses galvanized zinc-coated steel struts with a hardened chrome piston rod, a friction-optimized polyamide composite spring perch with a stainless-steel insert for corrosion-free height adjustment, and a multi-layered pressure-resistant sealing package. Built by hand by KW in Fichtenberg, Germany and dyno-tested to factory damper settings before shipping.
Specifications
| Type | Height-adjustable coilover kit (ST XA) |
| Adjustability | Ride height + damping |
| Damping | 16-click manual rebound |
| Construction | Galvanized zinc-coated steel |
| Part Number | 18210030 |
| Warranty | 5-year limited, unlimited mileage |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2008 | Audi | A4 | Base |
| 2003-2005,2007-2009 | Audi | A4 | Cabriolet |
| 2002-2008 | Audi | A4 Quattro | Base |
| 2004-2009 | Audi | A4 Quattro | Cabriolet |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
