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The Bilstein B16 (PSS9) suspension kit for the 2001 Audi S4 provides OE-quality direct-fit ride height adjustability with 9-stage manually adjustable monotube dampers that control rebound and compression, plus matched springs tuned for the application. A zinc-coated, threaded body allows roughly 30–50mm of lowering and Triple‑C surface protection against corrosion; manufactured in Germany and validated on the Nürburgring.
Bilstein B16 2001 Audi S4 Base Front and Rear Performance Suspension System
