{"product_id":"wilwood-260-16793-p","title":"Wilwood Chrome Powder Mopar Four-Bolt Tandem Master, 1-1\/8-inch Bore, Without Rod","description":"\u003cp\u003eThis Mopar Compact Tandem master combines the larger one-and-one-eighth-inch bore with a chrome powder-coated housing. Its integral reservoir feeds two circuits, while a separate compatible actuator must engage the piston because no pedal rod is supplied. Wilwood Engineering designs disc brake systems and manufactures a range of calipers, master cylinders, valves, fittings, rotors and brake lines. Founded in 1977 by Bill Wood, the Camarillo, California company serves specialized, street-performance and motorsport applications. Component selection requires understanding the brake assembly as a whole, including its hydraulic sizing and mechanical interfaces.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 260-16793-P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder bore:\u003c\/strong\u003e 1-1\/8\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure circuits:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStroke Length:\u003c\/strong\u003e 1.10 in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReservoir Type:\u003c\/strong\u003e Integral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFluid capacity:\u003c\/strong\u003e 7.8 \/ 4.7 oz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 7.16\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting centers:\u003c\/strong\u003e 3.25 × 1.76\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Chrome powder coat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNative pressure ports:\u003c\/strong\u003e 1\/2-20 at both circuits; use the correct included outlet adapters and seal washers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCircuit outlet adapters:\u003c\/strong\u003e Primary: 3\/8-24 or 1\/2-20 inverted flare; secondary: 3\/8-24 or 9\/16-20 inverted flare\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydraulic relationship:\u003c\/strong\u003e Equal pressure output from the two circuits before external proportioning; 2:1 primary\/secondary volume relationship\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService:\u003c\/strong\u003e Factory rebuild only; do not disassemble the tandem piston assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange-to-end references:\u003c\/strong\u003e Exact product page: 6.55 inches; DS-1520 dimensional drawing: 6.70 inches. Confirm the available installation envelope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCircuit routing:\u003c\/strong\u003e 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLinkage:\u003c\/strong\u003e Pushrod not included; match the existing or separately supplied actuation interface\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eVerify the actual four-bolt firewall or booster mounting and the actuator's depth before installation. The A\/B pressure outlets are opposite the factory original arrangement; follow the Wilwood routing instructions rather than copying old line positions. Match the selected flare adapters and retain the full 1.10-inch stroke.\u003c\/p\u003e\u003ch3\u003eManufacturer Documents\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.wilwood.com\/MasterCylinders\/MasterCylinderProd?itemno=260-16793-P\" target=\"_blank\" rel=\"noopener\"\u003eWilwood product specifications\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.wilwood.com\/PDF\/DataSheets\/ds1520.pdf\" target=\"_blank\" rel=\"noopener\"\u003eWilwood DS1520 instructions and specifications\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.wilwood.com\/PDF\/Flyers\/fl162.pdf\" target=\"_blank\" rel=\"noopener\"\u003eWilwood FL162 instructions and specifications\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor help choosing the correct service or conversion component, contact PMB Performance with the existing brake-system details. Our team has over 20 years of experience working through parts and fitment requirements.\u003c\/p\u003e","brand":"Wilwood","offers":[{"title":"Default Title","offer_id":67731107348658,"sku":"260-16793-P","price":377.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/260-16793-P-xl.jpg?v=1792184190","url":"https:\/\/pmbperformance.com\/products\/wilwood-260-16793-p","provider":"PMB Performance","version":"1.0","type":"link"}