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PowerStop Track Day rear brake kit for 2003–2008 BMW Z4 is a Stage 1 track-day upgrade intended for weekend HPDE with street tires. It pairs Track Day high-performance pads and Autospecialty rotors to resist fade, manage thermal load and deliver consistent pedal feel under heavy use. The kit is mill-balanced, engineered for stable modulation with carbon-fiber and metallic pad compounds, and includes hardware plus one sensor wire.
Power Stop 03-08 BMW Z4 Rear Track Day Brake Kit
