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Product details
The supplied pushrod makes this bare 7/8-inch High Volume Tandem master a starting point for a custom manual-brake linkage. Two integral chambers feed independent circuits, with plumbing access from either side of the aluminum body. The disc brake systems Wilwood Engineering designs and manufactures include calipers, rotors, master cylinders, brake lines, valves and fittings. The company dates to Bill Wood's founding in 1977 and is based in Camarillo, California. Motorsport, specialized and street-performance applications all call for parts matched to the operating requirements of the full system.
Technical Details
- Manufacturer part number: 260-9439
- 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: 12.26"
- Mounting centers: 3.22–3.40"
- Pushrod dimensions: 4.11" x 3/8-24
- 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
Confirm pedal ratio, clevis thread and 3.22–3.40-inch mounting centers. This is the general threaded-rod configuration rather than the Mustang eyelet version; verify full 1.10-inch stroke and complete rod return at the installed pedal.
Manufacturer Documents
- Wilwood product specifications
- Wilwood DS487 instructions and specifications
- Wilwood FL162 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.
