Wilwood Black Compact Master and Finned Aluminum Reservoir Kit, 7/8-Inch Bore, Single Outlet

A 7/8-inch compact master and hard-anodized finned reservoir form a single-circuit assembly. The reservoir mounts directly onto the master body, retaining an accessible fluid supply without remote feed hoses. Wilwood Engineering's disc brake systems bring together calipers, rotors, valves, master cylinders, fittings and brake lines. Founded by Bill Wood in 1977 and based in Camarillo, California, the company designs and manufactures products for motorsport, street-performance and specialized applications. The installed system determines which individual component is appropriate.

Technical Details

• Manufacturer part number: 261-16839-.88
• Material: Aluminum master body and billet aluminum reservoir
• Cylinder bore: 7/8"
• Pressure circuits: 1
• Stroke Length: 1.12 in
• Listed displacement per stroke: 0.67 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

Match the vertical two-bolt flange and pushrod alignment to the pedal. Select the 7/8-inch bore around the circuit's pressure and volume requirements.

Manufacturer Documents

• Wilwood product specifications
• Wilwood FL554 instructions and specifications
• Wilwood FL162 instructions and specifications

The component must suit the completed installation. PMB Performance draws on over 20 years of experience to help you check the part identification, mating connections and required operating dimensions.