Wilwood Chrome Powder-Coated Compact Tandem Master Kit for Mustang, 15/16-Inch Bore and Left Valve Bracket

SKU: 261-15523-P

$535.43

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Product details

The 15/16-inch integral-reservoir master is packaged for the specified Mustang manual-pedal connection. Its chrome powder-coated body accompanies a left-mounted combination valve and formed connecting tubes. Wilwood Engineering designs and manufactures disc brake systems in Camarillo, California. Bill Wood founded the company in 1977; its range now encompasses calipers, rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications. Each component must suit the hydraulic and mechanical requirements of the complete system.

Technical Details

Manufacturer part number: 261-15523-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, left-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

Match the actual Mustang pedal and master flange to the documented conversion. Check pushrod clearance throughout travel and the selected bore's hydraulic suitability.

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

PMB Performance brings over 20 years of brake-system experience to component selection. Send the installed cylinder, pedal and connection details if you need help checking this configuration.