Wilwood Right-Side Valve and Compact Tandem Master Cylinder Kit, Chrome Powder-Coated 15/16-Inch Bore with Pushrod

This right-bracket package pairs a chrome powder-coated, 15/16-inch master with its operating pushrod and combination valve. The compact tandem housing separates the two pressure circuits while its formed tubes connect to the valve. Disc brake systems and components are the focus of Wilwood Engineering's design and manufacturing work for street-performance, specialized and motorsport applications. Bill Wood founded the Camarillo, California company in 1977. Its master cylinders, calipers, fittings, valves, brake lines and rotors are chosen according to the needs of the complete brake system.

Technical Details

• Manufacturer part number: 261-15660-P
• Material: Aluminum
• Cylinder bore: 15/16"
• Pressure circuits: 2
• Stroke Length: 1.10 in
• Reservoir Type: Integral tandem chambers, 7.8 and 4.7 oz
• Fluid capacity: 7.8 / 4.7 oz
• Flange-to-end length: 6.55"
• Overall Length: 10.93"
• Mounting centers: 3.22–3.40"
• Pushrod dimensions: 4.38" x 3/8-24
• 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
• Kit contents: Master cylinder, right-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

Compare the mounting flange, pushrod alignment and right-side space with the intended installation. Establish the bore and required travel from the complete hydraulic system.

Manufacturer Documents

• Wilwood product specifications
• Wilwood FL162 instructions and specifications
• Wilwood DS1287 instructions and specifications
• Wilwood FL467 instructions and specifications
• Wilwood DS1178 instructions and specifications

For help choosing the correct service or conversion component, contact PMB Performance with the existing brake-system details. Our team has over 20 years of experience working through parts and fitment requirements.