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The Bilstein B16 (PSS9) suspension kit for 2005 Subaru Impreza WRX STI is a direct-fit front and rear system pairing monotube dampers with springs tuned for the STI to improve handling and control. The nine-stage manual damper adjusts both rebound and compression for adaptable performance across road and track conditions. Threaded, zinc-coated bodies permit approximately 30–50mm lowering; Triple-C corrosion protection and Nürburgring‑tested German engineering support long-term reliability.
Bilstein B16 2005 Subaru Impreza WRX STI Front and Rear Performance Suspension System
