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The Bilstein B16 (PSS9) suspension kit for 2004 BMW 645Ci is a direct-fit front and rear package that uses monotube dampers with matched springs tuned for the 645Ci to enhance handling while offering ride-height adjustment. The nine-stage manual damping lets you fine-tune rebound and compression for different driving scenarios. Threaded, zinc-coated bodies allow about 30–50mm lowering; Triple-C corrosion resistance and Nürburgring‑proven German development back the kit's durability.
Bilstein B16 2004 BMW 645Ci Base Front and Rear Performance Suspension System
