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Product details
This compact one-inch master kit is supplied without the manual operating pushrod. A black body, right-mounted valve and preformed connecting tubes provide the package for the matched actuation system. 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: 261-15661-BK
- Material: Aluminum
- Cylinder bore: 1.00"
- 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: 7.16"
- 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, 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
Confirm booster rod engagement and available right-side space. Maintain the required free play and full master-cylinder travel.
Manufacturer Documents
- Wilwood product specifications
- Wilwood FL162 instructions and specifications
- Wilwood DS1287 instructions and specifications
- Wilwood DS1178 instructions and specifications
PMB Performance has more than 20 years of experience matching brake components. Share the actual mounting, linkage and hydraulic arrangement when requesting fitment assistance.
