Wilwood Chrome Powder-Coated 15/16-Inch Mustang Master Kit, Right Valve Mount and Manual Pushrod

SKU: 261-15664-P

$535.43

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Product details

This chrome powder-coated compact master carries a 15/16-inch tandem bore in a Mustang manual-pedal package. A right-side bracket supports the combination valve, with formed tubes connecting its separate circuits to the master. Wilwood Engineering's design and manufacturing work covers disc brake systems for specialized applications, street performance and motorsport. Founded by Bill Wood in 1977, the company operates from Camarillo, California. Its component range includes master cylinders, fittings, brake lines, rotors, valves and calipers, each requiring selection in the context of the complete brake system.

Technical Details

Manufacturer part number: 261-15664-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
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

Verify the specified Mustang pedal connection and mounting pattern. The right bracket and tube set must clear the surrounding firewall components.

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

The component must suit the completed installation. PMB Performance draws on over 20 years of experience to help you check the part identification, mating connections and required operating dimensions.