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Product details
Chrome powder coating finishes the aluminum body of this one-inch tandem master. The paired integral chambers provide a 2:1 fluid-volume relationship while the hydraulic pressure output remains equal between circuits before any external proportioning. Established in 1977 by Bill Wood, Wilwood Engineering designs and manufactures disc brake systems from its base in Camarillo, California. Calipers, fittings, rotors, valves, master cylinders and brake lines serve its motorsport, street-performance and specialized applications. The full assembly, including its mating connections and operating requirements, governs the correct part selection.
Technical Details
- Manufacturer part number: 260-8555-P
- 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: 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
Fitment & Compatibility
Use in a properly matched manual or power-assisted arrangement with 3.22–3.40-inch mount spacing. Confirm booster or pushrod engagement, the full piston stroke and both outlet-adapter sizes; the master is supplied without a pushrod.
Manufacturer Documents
- Wilwood product specifications
- Wilwood DS487 instructions and specifications
- Wilwood FL162 instructions and specifications
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.
