ST Suspension ST X Coilover Kit for Audi A6 C5 and Volkswagen Passat B5.5 W8 — Part Number 13210026
Transform the stance, handling and ride of your Audi A6 C5 or Volkswagen Passat B5.5 W8 with the ST Suspension ST X coilover kit. Engineered by KW Automotive and built to last, these height adjustable coilovers deliver precise ride height control, sharper handling and a clean, level drop for the perfect OEM-plus or performance look. If you are searching for Audi A6 C5 coilovers, A6 Quattro coilover kit, A6 Avant coilovers, VW Passat B5.5 coilovers or Passat W8 coilover suspension in the UK, this ST X kit is the trusted, road-ready solution.
Why choose ST Suspension ST X coilovers
ST X coilovers are designed for real-world performance and reliability. With twin-tube dampers, a low-friction, pressure-resistant housing and a chrome-plated piston rod, the kit reduces body roll, tightens turn-in and improves agility while maintaining day-to-day drivability. The mono block guide and ST seal package keeps the damper internals protected from dirt and weather, and galvanised struts with an additional protective coating offer long-term corrosion resistance.
Height adjustment and lowering range
Dial in your stance with a robust polyamide spring seat on a continuous threaded body for easy, repeatable changes:
- Front lowering: 1.0 to 2.2 inches — approximately 25 to 55 mm
- Rear lowering: 1.0 to 2.2 inches — approximately 25 to 55 mm
Whether you want a subtle drop or a more aggressive look, these adjustable coilovers let you set ride height accurately for both performance and aesthetics.
Vehicle compatibility
- Audi A6 C5 1998–2004 — A6 Quattro and A6 Quattro Avant
- Volkswagen Passat B5 and B5.5 2002–2004 — Passat W8
Important note: Excludes models with automatic level control and vehicles with an adjustable level system.
Key features
- ST X version — height adjustable coilover suspension
- Individual lowering within the tested adjustment range — front and rear thread adjustment
- Galvanised steel struts with additional coating for optimised corrosion protection
- Complete solution with adjustable spring plate, race spring system, and bump stops with dust protection
- Powerful twin-tube dampers with high-quality components for maximum longevity
- Damping adjustment: none — set-and-forget road performance
- Manufactured by KW Automotive for consistent quality and durability
Part number
13210026
Real results, trusted by enthusiasts
We run ST Suspension on our own and customer cars, and feedback on the ST X kit has been consistently excellent — tighter handling, improved confidence and a clean, even drop without compromising everyday usability. If you want Audi A6 C5 coilovers UK or VW Passat W8 coilovers UK that simply work, this is the go-to choice.
Fitting and support
Professional installation available at Nforcd in Warwickshire. For a fitting quote, email Sales@nforcd.com. Our team can advise on ride height setup, alignment and aftercare to get the best from your coilover suspension.
Warranty
Two years manufacturer warranty.
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