Wilwood One-Inch Black Mopar Manual Master Kit with Right Valve Bracket and Four-Bolt Mount

SKU: 261-17797-BK

$549.28

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Product details

This black one-inch tandem master kit includes the manual pushrod and right-side combination valve assembly. The master's four-bolt Mopar mounting flange must match the vehicle's mounting face and pedal geometry. The broader Wilwood Engineering range includes calipers, brake lines, rotors, valves, fittings and master cylinders for disc brake systems. Established by Bill Wood in 1977 and based in Camarillo, California, Wilwood designs and manufactures for motorsport, street-performance and specialized applications. Correct component selection considers the complete system's geometry and hydraulic requirements.

Technical Details

Manufacturer part number: 261-17797-BK
Material: Aluminum
Cylinder bore: 1.00"
Pressure circuits: 2
Stroke Length: 1.10 in
Reservoir Type: Integral
Fluid capacity: 7.8 / 4.7 oz
Overall Length: 8.92"
Mounting centers: 3.25 × 1.76"
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 9/16-20 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, right-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
Flange-to-end references: Exact product page: 6.55 inches; DS-1520 dimensional drawing: 6.70 inches. Confirm the available installation envelope.
Circuit routing: Primary outlet A feeds the axle with greater total effective caliper piston area, normally the front; secondary B feeds the lesser-area axle, normally the rear. Outlet locations are reversed from the original Mopar master cylinder; follow DS-1520.
Linkage: Included pushrod with Mopar eyelet; 3/8-24 adjustment thread. The drawing identifies a 2.00-inch eyelet, not the complete pushrod length.

Fitment & Compatibility

Compare the exact pedal, flange and pushrod arrangement. Select the one-inch bore with the calipers and verify right-side line routing and fitting seats.

Manufacturer Documents

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.