Wilwood 3/4-inch High Volume Master Cylinder Rebuild Kit for Integral-Reservoir Units

This service kit renews the internal sealing components of the 3/4-inch High Volume single master. It is a repair package for the existing aluminum cylinder, rather than a replacement master-cylinder assembly. Since its founding by Bill Wood in 1977, Wilwood Engineering has designed and manufactured disc brake systems. Its Camarillo, California operation supplies master cylinders, brake lines, valves, rotors, fittings and calipers for specialized applications as well as motorsport and street-performance vehicles. Replacement and conversion parts need to match the complete braking arrangement.

Technical Details

• Manufacturer part number: 260-6898
• Component: Cylinder rebuild/service kit; replacement housing not included
• Service bore: 3/4"
• Verified service contents: Piston/seal, spring, washers, retaining ring and boot
• Package confirmation: Exact summary includes pushrod and lid gasket; DS412 does not mark those items as rebuild-kit contents

Fitment & Compatibility

Use with Wilwood 260-6764 only after confirming the bore and inspecting the housing. The product summary includes a pushrod and lid gasket, while DS-412 does not mark those items as kit contents; confirm those two pieces if they are required for the repair.

Manufacturer Documents

• Wilwood product specifications
• Wilwood DS412 instructions and specifications
• Wilwood FL162 instructions and specifications

PMB Performance offers over 20 years of parts and brake-fitment experience. For a compatibility check, provide the existing assembly and the dimensions that govern the replacement.