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Product details
A black E-coat finish identifies this one-inch High Volume Tandem master. Its two integral fluid chambers feed separate circuits, and the unused outlet side can be plugged to accommodate the vehicle's brake-line routing. The manufacturer is Wilwood Engineering of Camarillo, California, established by Bill Wood in 1977. Wilwood designs and manufactures disc brake systems alongside calipers, fittings, master cylinders, rotors, brake lines and valves. Its street-performance, motorsport and specialized ranges require component selection around the demands of the complete assembly.
Technical Details
- Manufacturer part number: 260-8555-BK
- Material: Aluminum
- Cylinder bore: 1.00"
- 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: 8.76"
- Mounting centers: 3.22–3.40"
- Finish: Black E-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
Fitment & Compatibility
The bore can serve manual or assisted brakes when pedal leverage and displacement are matched. Verify mounting centers of 3.22–3.40 inches, reservoir clearance and the required linkage; the package omits a pushrod.
Manufacturer Documents
- Wilwood product specifications
- Wilwood DS487 instructions and specifications
- Wilwood FL162 instructions and specifications
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.
