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Product details
Unlike the rodless one-inch package, this black Remote Tandem kit includes the captured pushrod for a manual linkage. It retains the twin reservoir equipment and left-hand combination valve, with the connecting tubes and fasteners provided. Master cylinders are part of Wilwood Engineering's wider disc brake range, alongside calipers, rotors, valves, fittings and brake lines. Wilwood was founded in 1977 by Bill Wood and designs and manufactures its systems from Camarillo, California for motorsport, specialized and street-performance applications. Hydraulic sizing and mechanical compatibility remain decisions for the complete brake system.
Technical Details
- Manufacturer part number: 261-14390-BK
- Material: Aluminum / Plastic
- Cylinder bore: 1.00"
- Pressure circuits: 2
- Reservoir Type: Remote
- Fluid capacity: 7.0 / 7.0 oz
- Flange-to-end length: 6.56"
- Mounting centers: 3.22–3.40"
- Pushrod dimensions: 4.23" 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
- 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 feed: 0.87-inch inlet seating diameter with 11/16-20 internal thread; 1/4-inch feed-hose adapters for the standard remote reservoirs
- Reservoir package: Two 7 oz reservoirs with caps, brackets, clamps, hoses and feed adapters for direct or remote mounting
- Housing envelope: 7.16 inches as listed, excluding the projecting operating rod; verify the complete rod-equipped length
Fitment & Compatibility
Match the 3/8-24 rod to the pedal clevis and verify leverage for the one-inch bore. Check the complete envelope including the projecting rod; the listed 7.16-inch housing envelope does not describe the assembled length with that rod extended.
Manufacturer Documents
- Wilwood product specifications
- Wilwood DS1189 instructions and specifications
- Wilwood FL162 instructions and specifications
- Wilwood DS1178 instructions and specifications
PMB Performance offers over 20 years of parts and brake-fitment experience. For a compatibility check, provide the existing assembly and the dimensions that govern the replacement.
