Wilwood 15/16-inch Compact Ford Mustang Master with Eyelet, Chrome Powder Finish

This chrome powder-coated master places a fifteen-sixteenths-inch tandem bore beneath an integral two-chamber reservoir. The supplied Ford-style pushrod includes the pedal eyelet, distinguishing this assembly from the generic threaded-rod Compact Tandem version. Bill Wood's founding of Wilwood Engineering in 1977 established a disc brake design and manufacturing business based in Camarillo, California. Calipers, rotors, master cylinders, fittings, valves and brake lines form its range for motorsport, street-performance and specialized applications. Choosing a service component still requires checking the mating parts and overall system configuration.

Technical Details

• Manufacturer part number: 260-15521-P
• Material: Aluminum
• Cylinder bore: 15/16"
• 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

Compare the real factory manual pedal to the specified Mustang-style linkage. The exact page references 1964–1972 Mustang geometry; Wilwood's Ford-style flyer covers compatible 1960–1973 Ford pedal arrangements more broadly. Check rod travel and line routing individually, and select brake-bias components to suit the installed brakes.

Manufacturer Documents

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

PMB Performance has more than 20 years of experience matching brake components. Share the actual mounting, linkage and hydraulic arrangement when requesting fitment assistance.