Wilwood High Volume Single Master Cylinder Service Kit, 7/8-inch Bore

The 7/8-inch bore determines the application of this High Volume master-cylinder repair kit. Its piston and sealing components restore the appropriate existing single-circuit unit when the housing remains serviceable. Wilwood Engineering, the Camarillo, California disc brake manufacturer founded by Bill Wood in 1977, designs and builds systems for specialized, motorsport and street-performance applications. The product range covers brake lines, valves, fittings, calipers, master cylinders and rotors. A replacement component must preserve the intended relationship between the system's hydraulic and mechanical parts.

Technical Details

• Manufacturer part number: 260-6899
• Component: Cylinder rebuild/service kit; replacement housing not included
• Service bore: 7/8"
• 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

Match the original master to 260-6765 and inspect the bore before replacing internal parts. The exact product summary and the DS-412 kit-item markings disagree about the pushrod and lid gasket, so do not plan a repair around their inclusion without confirmation.

Manufacturer Documents

• Wilwood product specifications
• Wilwood DS412 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.