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The Wilwood 1.38-inch diameter by .82-inch long piston assembly is a replacement brake piston matching those dimensions for compatible Wilwood units. It’s intended for caliper rebuilds or repairs that require a 1.38" piston to restore proper hydraulic operation and piston travel. Install during caliper service to maintain correct brake function in systems specifying these measurements.
Wilwood 1.38 DIAx.82 LG Piston Assembly
