Wilwood Mustang Manual-Brake Assembly with 7/8-Inch Compact Tandem Master, Chrome Powder-Coated Body and Right Valve

SKU: 261-15663-P

$535.43

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Product details

The chrome powder-coated, 7/8-inch Mustang master is supplied with the manual-pedal pushrod and a right valve bracket. Its bore and input linkage must suit the specified conversion together. 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: 261-15663-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
Kit contents: Master cylinder, right-side combination proportioning valve and bracket, formed stainless connecting tubes and mounting hardware
Combination-valve functions: Adjustable rear pressure, isolated front/rear circuits, front-line junction and hydraulic brake-light switch

Fitment & Compatibility

Use the documented classic Mustang manual application to check pedal engagement. Confirm bore selection and clearance around the right-side valve and tubing.

Wilwood’s kit summary gives a 1964–1973 Ford/Mustang range, while the corresponding bare-master family identifies 1964–1972. Confirm the actual manual pedal, supplied eyelet and mounting geometry, particularly for 1973, before ordering.

Manufacturer Documents

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.