Wilwood 13/16-inch Compact Hydraulic Master Cylinder Piston and Seal Rebuild Kit

A 13/16-inch piston distinguishes this repair set from the adjacent Compact Remote bore sizes. The service components renew the internal sealing and dust protection while retaining the existing master-cylinder housing and mounting arrangement. The manufacturer is Wilwood Engineering of Camarillo, California, established by Bill Wood in 1977. Wilwood designs and manufactures disc brake systems alongside calipers, fittings, master cylinders, rotors, brake lines and valves. Its street-performance, motorsport and specialized ranges require component selection around the demands of the complete assembly.

Technical Details

• Manufacturer part number: 260-10515
• Component: Cylinder rebuild/service kit; replacement housing not included
• Service bore: 13/16"
• Service components: Piston/seal assembly, spring, dust boot, retaining ring and washer
• Housing condition: Do not hone the aluminum bore; replace a damaged or corroded cylinder

Fitment & Compatibility

The specified applications are Wilwood 260-10373, 260-12386 and 260-13620. Match the part identity before installation and inspect the bore for scoring or pitting. A damaged cylinder requires replacement; the manufacturer prohibits honing the aluminum bore.

Manufacturer Documents

• Wilwood product specifications
• Wilwood DS620 instructions and specifications
• Wilwood FL162 instructions and specifications

PMB Performance brings over 20 years of brake-system experience to component selection. Send the installed cylinder, pedal and connection details if you need help checking this configuration.