Wilwood Black 1-1/8-Inch Compact Single-Outlet Master Kit with Finned Aluminum Reservoir

A 1-1/8-inch bore provides the larger-bore option in this compact single-circuit kit. The finned billet reservoir mounts directly to the black master, with the mounting flange and pushrod to be matched to the pedal. 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: 261-16841-1.12
• Material: Aluminum master body and billet aluminum reservoir
• Cylinder bore: 1-1/8"
• Pressure circuits: 1
• Stroke Length: 1.12 in
• Listed displacement per stroke: 1.01 cu in
• Reservoir Type: Direct-mounted reservoir on Compact Remote cylinder
• Fluid capacity: 4.00 oz
• Flange-to-end length: 3.37"
• Overall Length: 7.80"
• Mounting centers: 2.25"
• Pushrod dimensions: 4.00" 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: 1/8-27 NPT outlet; select the appropriate pressure-line adapter
• Reservoir package: One directly mounted 4 oz Type III hard-anodized finned billet reservoir with cap and seals

Fitment & Compatibility

Select the bore for the actual circuit and pedal ratio. Verify outlet fitting, reservoir clearance and the full stroke before setting any mechanical stop.

Manufacturer Documents

• Wilwood product specifications
• Wilwood FL554 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.