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The ST X coilover kit for 1999–2003 BMW 525i/528i/540i E39 Sports Wagon with factory air suspension balances curve-hugging handling and everyday comfort. It delivers wide ride-height adjustability via a wear-resistant polyamide composite spring perch with a stainless-steel insert, galvanized zinc-coated struts, integrated dust protection and multi-layer seals. Dampers are tuned and hand-built by KW in Germany and dyno-tested, with a 5-year limited warranty.
ST Coilover Kit 99-03 BMW 525i/528i/540i E39 Sports Wagon w/Factory Air Suspension
