ST Suspensions ST X Coilover Kit for Select 2008-2017 Audi A4, A5, S4, and S5 - 13210075

Fits select 2008-2017 Audi A4, A5, S4, and S5 models (B8/B8.5 chassis).

The ST X Coilover suspension is engineered for the enthusiast who demands a lower stance and improved cornering without sacrificing daily drivability. Built by the experts at KW in Fichtenberg, Germany, these kits feature application-specific spring rates and damping profiles to balance sporty handling with road comfort. Each damper is verified on a shock dyno to ensure performance consistency before leaving the factory.

Durability is central to the ST X design. The struts are constructed from galvanized zinc-coated steel for maximum corrosion resistance. Height adjustment is handled by a friction-optimized polyamide composite spring perch with a stainless steel insert, preventing the oxidation and seizing common with all-metal designs. A multi-layered pressure sealing system and integrated dust boots protect the hardened chrome piston rods from road debris and moisture.

• Individual ride height adjustability using a unique trapezoidal thread pitch
• Galvanized steel strut housings for long-term corrosion protection
• Polyamide composite spring perches with stainless steel inserts
• Internal mono block guide system with low-friction piston bands
• Elastomer bump stops with integrated dust protection
• KW-engineered damping technology for street performance
• 5-Year Limited Warranty / Unlimited Mileage
• Made in Germany
• Manufacturer Part Number: 13210075