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The StopTech 44mm piston is a replacement component specified for STR-40 caliper rebuilds, provided at the correct 44mm diameter for that unit. Intended as a service part during an STR-40 caliper overhaul, it supplies the proper piston sizing needed to reassemble the original caliper housing. Use it alongside the matching seals and rebuild hardware to complete a correct caliper rebuild.
StopTech 44mm Piston for STR-40 Caliper Rebuild Component
