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Product details
This bare aluminum tandem master is configured for the factory manual-brake pedal used in the specified early Mustang application. Its included pushrod, seven-eighths-inch bore and dual reservoir chambers support a custom brake conversion after pedal travel and line routing have been checked. Since its founding by Bill Wood in 1977, Wilwood Engineering has designed and manufactured disc brake systems. Its Camarillo, California operation supplies master cylinders, brake lines, valves, rotors, fittings and calipers for specialized applications as well as motorsport and street-performance vehicles. Replacement and conversion parts need to match the complete braking arrangement.
Technical Details
- Manufacturer part number: 260-12900
- Material: Aluminum
- Cylinder bore: 7/8"
- 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
Wilwood identifies the 1964–1972 Ford Mustang manual pedal and 3.22–3.40-inch mounting range. It is not a universal bolt-in hydraulic replacement: a conversion from a single-outlet master requires separate front and rear plumbing. The full 1.10-inch stroke must remain available, and the proportioning valve is purchased separately.
Manufacturer Documents
- Wilwood product specifications
- Wilwood DS969 instructions and specifications
- Wilwood FL162 instructions and specifications
- Wilwood DS487 instructions and specifications
PMB Performance offers over 20 years of parts and brake-fitment experience. For a compatibility check, provide the existing assembly and the dimensions that govern the replacement.
