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Product details
This kit joins a bare one-inch High Volume Tandem master to a left-mounted combination proportioning valve. The matched bracket, formed stainless tubes and hardware connect the two components while retaining separate front and rear circuits. Founded in 1977 by Bill Wood, Wilwood Engineering carries out disc brake design and manufacturing from Camarillo, California. Its rotors, calipers, brake lines, master cylinders, fittings and valves serve motorsport, street-performance and specialized applications. Parts within that range must be matched to one another and to the requirements of the complete braking system.
Technical Details
- Manufacturer part number: 261-13269
- 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
- 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
Select the one-inch bore for the installed calipers and manual or assisted pedal arrangement. Confirm 3.22–3.40-inch flange centers and room beside the master for the left valve; the pushrod or booster interface must be supplied separately.
Manufacturer Documents
- Wilwood product specifications
- Wilwood DS985 instructions and specifications
- Wilwood FL331 instructions and specifications
- Wilwood FL162 instructions and specifications
- Wilwood DS487 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.
