Wilwood 1-1/8-inch Compact Tandem Master with Pushrod, Black Manual-Linkage Version

This one-and-one-eighth-inch Compact Tandem master is the pushrod-equipped version, distinct from the rodless model intended primarily for assisted layouts. The black housing contains both reservoir chambers and supplies the threaded rod needed for a suitable manual linkage. The manufacturer is Wilwood Engineering of Camarillo, California, established by Bill Wood in 1977. Wilwood designs and manufactures disc brake systems alongside calipers, fittings, master cylinders, rotors, brake lines and valves. Its street-performance, motorsport and specialized ranges require component selection around the demands of the complete assembly.

Technical Details

• Manufacturer part number: 260-15541-BK
• Material: Aluminum
• Cylinder bore: 1-1/8"
• 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: 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

Fitment & Compatibility

Check the complete brake-system calculation before choosing the larger bore. Match the 3/8-24 rod, 3.22–3.40-inch flange and 1.10-inch stroke to the pedal. Neither the included pushrod nor the familiar flange dimensions establish a direct vehicle application without these checks.

Manufacturer Documents

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

PMB Performance brings over 20 years of brake-system experience to component selection. Send the installed cylinder, pedal and connection details if you need help checking this configuration.