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The ST X coilover kit for 2009–2016 BMW Z4 (Z89) offers a street-oriented mix of sport and comfort with wide ride-height adjustability for custom fitment. It uses a polyamide composite spring perch with embedded stainless-steel insert to resist corrosion, galvanized zinc-coated struts, integrated dust protection and durable seals. Dampers are tuned by ST’s vehicle dynamics engineers and hand-built by KW in Germany, with dyno verification and a 5-year limited warranty.
ST Coilover Kit 09-16 BMW Z4 (Z89)
