Wilwood Black Power-Brake Master Cylinder and Left Combination Valve Kit, 1-1/8-inch Bore

SKU: 261-13270-BK

$456.55

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Product details

This black master-and-valve package combines the high-displacement tandem bore with a left-hand brake proportioning assembly. Its integral 8.0 and 4.8 oz reservoirs keep the fluid supply on the cylinder, and formed tubes are included between the master and valve. Founded by Bill Wood in 1977, Wilwood Engineering is based in Camarillo, California. The company designs and builds disc brake systems, with calipers, master cylinders, rotors, brake lines, fittings and valves serving street-performance, motorsport and specialized applications. Selecting an individual part requires checking how it works with the rest of the braking assembly.

Technical Details

Manufacturer part number: 261-13270-BK
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: 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
Kit contents: Master cylinder, left-side combination proportioning valve and bracket, formed stainless connecting tubes and mounting hardware
Combination-valve functions: Adjustable rear pressure, isolated front/rear circuits, front-line junction and hydraulic brake-light switch

Fitment & Compatibility

Use primarily with an appropriately matched power-brake system. Confirm mounting spacing, booster output and the separately provided operating connection; the larger bore is not a substitute for checking the pedal effort required by the brakes.

Manufacturer Documents

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.