Wilwood Chrome Powder One-Inch Compact Master Cylinder with Integral Reservoir and Pushrod

SKU: 260-15540-P

$365.21

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Product details

The one-inch piston bore is paired with a captured pushrod in this chrome powder-coated Compact Tandem master. Its integral reservoir contains two separate chambers, and the body offers outlet choices on either side for the chosen brake-line routing. 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: 260-15540-P
Material: Aluminum
Cylinder bore: 1.00"
Pressure circuits: 2
Stroke Length: 1.10 in
Reservoir Type: Integral tandem chambers, 7.8 and 4.7 oz
Fluid capacity: 7.8 / 4.7 oz
Flange-to-end length: 6.55"
Overall Length: 10.93"
Mounting centers: 3.22–3.40"
Pushrod dimensions: 4.38" x 3/8-24
Finish: Chrome powder 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

Fitment & Compatibility

Allow for the rod-equipped installation length and verify the 3.22–3.40-inch flange matches the mount. Confirm that the manual pedal provides suitable leverage and the complete 1.10-inch stroke. Fit the supplied inverted-flare adapters to double-flared lines and plug the unused ports with the supplied seals.

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.