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FSL4R/ST calipers provide performance advantages of Thermlock® pistons for ultimate heat protection. Thermlock® pistons used in the ST models block heat transfer from the pads and reduce temperatures in the caliper, fluid, and seals by up to 25% over standard stainless steel pistons. Featuring Type III Anodize finish, these are the go-to calipers for all types sustained hard braking on dirt and asphalt ovals and a wide range of off-road, rally and road course applications.
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Paying for expedited shipping methods only affects the time frame once the package is in the hands of the carrier. Paying for these methods does not and can not affect actual product availability or turn around times.