Wilwood Chrome Powder-Coated One-Inch Tandem Master Kit with Angled GM-Style Reservoirs and Left Valve Bracket

A chrome powder-coated, one-inch remote-body tandem master is paired with angled reservoirs and a left valve assembly. The fluid containers are arranged for the specified GM-style installation angle, which must match the mounting position. 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: 261-16962-P
• Material: Aluminum
• Cylinder bore: 1.00"
• Pressure circuits: 2
• Reservoir Type: Angled direct-mount containers on Remote Tandem cylinder
• Fluid capacity: 7.8 / 4.7 oz
• Flange-to-end length: 6.56"
• Overall Length: 7.16"
• Mounting centers: 3.22–3.40"
• 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, 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
• Travel check: DS-1189 specifies 1.12-inch stroke and also states 1.10 inches in its full-travel warning; verify actual full piston travel before the pedal reaches a stop
• Reservoir package: Direct-mounted angled reservoirs, 7.8 and 4.7 oz, with tops level when the master is tilted upward 15 degrees

Fitment & Compatibility

Check the 15-degree mounting arrangement and booster clearance. Confirm flange fit, reservoir space and vehicle-line connections for the actual brake system.

Manufacturer Documents

• Wilwood product specifications
• Wilwood DS1189 instructions and specifications
• Wilwood FL162 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.