Wilwood natural cast-metal tandem master with oval black logo cover and rubber input boot

Wilwood High Volume Tandem Brake Master Cylinder, Bare Aluminum, 1-inch Bore Without Pushrod

SKU: 260-8555

$262.93 Sale
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Fitment questions?

Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.

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Product details

This bare aluminum High Volume Tandem master uses a one-inch bore for appropriately matched manual or power-assisted brakes. Integral 8.0 and 4.8 oz fluid chambers and outlets on both sides provide routing options without remote reservoir hoses. The broader Wilwood Engineering range includes calipers, brake lines, rotors, valves, fittings and master cylinders for disc brake systems. Established by Bill Wood in 1977 and based in Camarillo, California, Wilwood designs and manufactures for motorsport, street-performance and specialized applications. Correct component selection considers the complete system's geometry and hydraulic requirements.

Technical Details

  • Manufacturer part number: 260-8555
  • 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: 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 the 3.22–3.40-inch flange spacing, linkage or booster engagement and available 1.10-inch stroke. No pushrod is supplied; select the correct rod or booster interface and connect each hydraulic circuit according to DS-487.

Manufacturer Documents

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.