Wilwood bare tandem master with black oval logo lid, rubber boot and Mustang pedal eyelet

Wilwood Bare 15/16-inch Tandem Master for 1964–1972 Ford Mustang Manual Brakes

SKU: 260-14157

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Product details

For a manual-brake conversion on a 1964–1972 Ford Mustang, this tandem master includes the matching factory-pedal pushrod. The bare aluminum housing carries a fifteen-sixteenths-inch bore and separate primary and secondary fluid chambers. A disc brake manufacturer based in Camarillo, California, Wilwood Engineering was founded by Bill Wood in 1977. It designs and manufactures calipers, rotors, brake lines, fittings, valves and master cylinders for street-performance, motorsport and specialized systems. The chosen service part must agree with the complete system's connections, dimensions and operating demands.

Technical Details

  • Manufacturer part number: 260-14157
  • Material: Aluminum
  • Cylinder bore: 15/16"
  • Pressure circuits: 2
  • Stroke Length: 1.10 in
  • Reservoir Type: Integral
  • Fluid capacity: 8.0 / 4.8 oz
  • Flange-to-end length: 8.15"
  • Overall Length: 13.65"
  • Mounting centers: 3.22–3.40"
  • Pushrod dimensions: 5.75"
  • Finish: Bare
  • 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

Verify the original manual pedal arrangement and 3.22–3.40-inch flange spacing. Replacing a single-outlet master requires separate front and rear hydraulic circuits, not simply a mounting swap. Check the full 1.10-inch stroke before the pedal meets the floor, and select any required proportioning valve separately.

Manufacturer Documents

With more than 20 years of experience, PMB Performance can help compare the specified part with the assembly you are servicing. Include the existing part identification and relevant hydraulic dimensions.