Wilwood bright-finish tandem master body with black lid, rubber input cover and side fittings

Wilwood Chrome Powder-Coated Tandem Power-Brake Master Cylinder, 1-1/8-inch Bore

SKU: 260-8556-P

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Product details

This chrome powder-coated master combines a large 1-1/8-inch tandem bore with integral high-volume reservoirs. It is the assisted-brake size of the family, intended primarily to work with a suitable vacuum or hydraulic booster. For motorsport, street-performance and specialized applications, Wilwood Engineering designs and manufactures disc brake systems and their components. The Camarillo, California company was founded by Bill Wood in 1977. Its range of rotors, calipers, valves, fittings, brake lines and master cylinders supports assemblies whose individual parts must be selected to work together.

Technical Details

  • Manufacturer part number: 260-8556-P
  • Material: Aluminum
  • Cylinder bore: 1-1/8"
  • 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: 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

Verify the booster-to-piston interface and 3.22–3.40-inch flange centers before installation. Keep the two circuits separate and follow the supplied adapter and port-plug arrangement; a compatible pushrod is not part of this package.

Manufacturer Documents

The component must suit the completed installation. PMB Performance draws on over 20 years of experience to help you check the part identification, mating connections and required operating dimensions.