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The H&R Sport Spring kit for 2003–2008 BMW Z4 (E85) trims fender well gap while lowering the center of gravity for better handling. The progressive spring design reduces body roll and preserves ride quality for daily driving. Built from shot-peened 54SiCr6 spring steel and manufactured in Germany, these lightweight springs are H&R's top-selling option to sharpen stance and potentially improve fuel efficiency.
H&R 03-08 BMW Z4 E85 Sport Spring
