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Product details
The fifteen-sixteenths-inch Compact Tandem master provides an integral reservoir and a Ford-style eyelet pushrod in a black-finished housing. Its bore is a hydraulic tuning choice that must agree with pedal leverage and brake volume, not simply the vehicle's model name. Bill Wood established Wilwood Engineering in 1977. From Camarillo, California, Wilwood designs and manufactures disc brake systems and a component range covering master cylinders, rotors, calipers, fittings, valves and brake lines. Across its motorsport, specialized and street-performance applications, the correct choice depends on the complete brake system rather than one dimension alone.
Technical Details
- Manufacturer part number: 260-15521-BK
- 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: Black E-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
Wilwood identifies the 1964–1972 Mustang factory manual pedal on this master page and broader 1960–1973 Ford pedal compatibility in its flyer. Confirm the actual eyelet and mounting geometry, including the 3.22–3.40-inch flange span. The piston requires its full 1.10-inch stroke and unrestricted return.
Manufacturer Documents
- Wilwood product specifications
- Wilwood DS1287 instructions and specifications
- Wilwood FL162 instructions and specifications
For help choosing the correct service or conversion component, contact PMB Performance with the existing brake-system details. Our team has over 20 years of experience working through parts and fitment requirements.
