Wilwood Side-Mount Compact Master, 7/8-inch Bore, Banjo Outlet and Reservoir Kit

A side-mounted body and extended threaded pushrod distinguish this seven-eighths-inch master from the flange version. The kit supplies a 4.5-ounce reservoir for a smaller envelope and a ten-ounce alternative, with the hardware needed to choose direct or remote fluid storage. Wilwood Engineering serves motorsport, specialized and street-performance applications through disc brake system design and manufacturing. Bill Wood founded the company in 1977, and it is based in Camarillo, California. The range spans valves, rotors, fittings, calipers, brake lines and master cylinders; the installed braking assembly determines the appropriate combination of parts.

Technical Details

• Manufacturer part number: 260-13624
• Material: Aluminum / Plastic
• Cylinder bore: 7/8"
• Pressure circuits: 1
• Stroke Length: 1.12 in
• Listed displacement per stroke: 0.67 cu in
• Reservoir Type: Remote
• Flange-to-end length: 3.37"
• Overall Length: 8.84"
• Mounting centers: 3.00 inches, side mount
• Pushrod dimensions: 5.01" x 5/16-24
• Finish: Black E-coat
• Inlet arrangement: 0.87-inch seating diameter with 11/16-20 internal thread; this is the reservoir feed, not the pressure outlet
• Pressure connection: 3/8-24 banjo outlet; suitable banjo fitting is purchased separately
• Reservoir package: 4.5 and 10 oz plastic reservoir bodies, cap, remote hose, adapters, clamps and bracket hardware
• Fluid selection: DOT 3, DOT 4 or DOT 5.1 for racing/performance use; DOT 5 silicone is not recommended for those uses

Fitment & Compatibility

Use a rigid support with three-inch side-mount centers and verify the 5.01-inch pushrod length against the pedal layout. Its 3/8-24 pressure outlet takes a banjo connection, with the fitting selected separately. Check reservoir capacity, cap access and the full 1.12-inch piston stroke before finalizing the installation.

Manufacturer Documents

• Wilwood product specifications
• Wilwood DS1058 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.