Wilwood Chrome Powder Compact Mustang-Style Master, 7/8-inch Bore with Pedal Eyelet

A chrome powder-coated Compact Tandem housing carries this seven-eighths-inch master and its two fluid chambers. The included eyelet pushrod targets the specified Ford manual-pedal arrangement, avoiding the need to infer linkage fit from the mounting flange alone. A disc brake manufacturer based in Camarillo, California, Wilwood Engineering was founded by Bill Wood in 1977. It designs and manufactures calipers, rotors, brake lines, fittings, valves and master cylinders for street-performance, motorsport and specialized systems. The chosen service part must agree with the complete system's connections, dimensions and operating demands.

Technical Details

• Manufacturer part number: 260-15520-P
• Material: Aluminum
• Cylinder bore: 7/8"
• Pressure circuits: 2
• Stroke Length: 1.10 in
• Reservoir Type: Integral tandem chambers, 7.8 and 4.7 oz
• Fluid capacity: 7.8 / 4.7 oz
• Flange-to-end length: 6.55"
• Overall Length: 12.32"
• Mounting centers: 3.22–3.40"
• Pushrod dimensions: 5.75"
• Finish: Chrome powder coat
• Native pressure ports: 1/2-20 at both circuits; use the correct included outlet adapters and seal washers
• Circuit outlet adapters: Primary: 3/8-24 or 1/2-20 inverted flare; secondary: 3/8-24 or 9/16-18 inverted flare
• Hydraulic relationship: Equal pressure output from the two circuits before external proportioning; 2:1 primary/secondary volume relationship
• Service: Factory rebuild only; do not disassemble the tandem piston assembly

Fitment & Compatibility

Check the factory pedal geometry against the master page's 1964–1972 Mustang reference and Wilwood's broader Ford-style flyer. Verify rod engagement, full travel and reservoir access in the actual installation. A single-outlet system conversion requires new independent front and rear circuit plumbing.

Manufacturer Documents

• Wilwood product specifications
• Wilwood DS1287 instructions and specifications
• Wilwood FL162 instructions and specifications
• Wilwood FL467 instructions and specifications

With more than 20 years of experience, PMB Performance can help compare the specified part with the assembly you are servicing. Include the existing part identification and relevant hydraulic dimensions.