The ST X is a height-adjustable coilover kit built by KW in Fichtenberg, Germany, using the same valving and damper technology as the KW Variant 1 but with a galvanized zinc coated steel strut housing in place of stainless steel. Front ride height adjusts 0.8 to 2.0 inches and rear ride height 0.6 to 1.4 inches through a polyamide composite spring perch with an embedded stainless steel insert, which stops corrosion between the strut and the perch so the height stays adjustable years later. Damping is fixed rather than adjustable, tuned in Germany for this specific chassis, and every twin-tube damper is shock dyno tested before it is boxed. A multi-layered sealing package, mono block guide system, low friction piston band, and elastomer bump stop with an integrated dust boot protect the hardened chrome piston rod from water and dirt.
Specifications
| Type | Height-adjustable coilover kit (ST X), fixed damping |
| Position | Front and rear (four corner kit) |
| Front Lowering | 0.8 to 2.0 in |
| Rear Lowering | 0.6 to 1.4 in |
| Damper | Twin-tube, non-adjustable, built by KW |
| Strut Housing | Galvanized zinc coated steel |
| Spring Perch | Polyamide composite with stainless steel insert |
| Quantity | 1 kit (4 coilovers) |
| Warranty | 5 year limited warranty, unlimited mileage |
| Part Number | 13210041 |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2000-2006 | Audi | TT Quattro | Base |
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
