{"product_id":"dorman-m39457-brake-master-cylinder","title":"Dorman M39457 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Precise Hydraulic Control\u003c\/h2\u003e\u003cp\u003eThe Dorman M39457 brake master cylinder is engineered to provide consistent hydraulic pressure for your vehicle's braking system. Designed with a durable cast iron construction and a 1.75-inch bore diameter, this master cylinder ensures reliable performance for compatible makes and models requiring precise brake hydraulics.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCast iron master cylinder material for durability and strength\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir for fluid storage and management\u003c\/li\u003e\n\u003cli\u003e1.75-inch bore diameter optimized for effective hydraulic pressure\u003c\/li\u003e\n\u003cli\u003eTwo outlet ports with secondary outlet thread diameter of 0.5 inches\u003c\/li\u003e\n\u003cli\u003eRearward outlet size of 9\/16-18 for secure brake line connections\u003c\/li\u003e\n\u003cli\u003ePackage contains the master cylinder unit only; mounting hardware not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman M39457 brake master cylinder is designed to replace worn or damaged units in vehicles requiring a 1.75-inch bore diameter master cylinder. Constructed from cast iron, it offers enhanced resistance to wear and corrosion, contributing to long-term reliability. The included reservoir allows for proper brake fluid containment and management, essential for maintaining consistent brake pressure. Featuring two outlets, this master cylinder supports dual-circuit brake systems, with a secondary outlet thread diameter of 0.5 inches and a rearward outlet size of 9\/16-18, ensuring compatibility with standard brake line fittings.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores proper hydraulic pressure in brake systems with failing master cylinders\u003c\/li\u003e\n\u003cli\u003eEliminates brake pedal sponginess caused by internal leaks\u003c\/li\u003e\n\u003cli\u003eResolves brake fluid leaks from damaged or corroded master cylinders\u003c\/li\u003e\n\u003cli\u003eImproves brake response and safety in vehicles with dual outlet brake systems\u003c\/li\u003e\n\u003cli\u003eReplaces master cylinders with worn or damaged reservoirs to prevent fluid contamination\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Dorman M39457 master cylinder, ensure the brake system is properly bled to remove air and maintain hydraulic integrity. Verify compatibility with your vehicle’s brake line fittings, especially the 0.5-inch secondary outlet thread and 9\/16-18 rearward outlet size. Since mounting hardware is not included, retain or source appropriate fasteners for secure installation. Follow manufacturer torque specifications to avoid damage during installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M39457 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction and integrated reservoir contribute to dependable brake system performance. While specific warranty details vary, Dorman typically offers limited warranties covering defects in materials and workmanship. Consult product documentation for exact warranty terms.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":51915814699189,"sku":"BKKX-M39457","price":296.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M39457_Fro.jpg?v=1774997472","url":"https:\/\/www.partcatalog.com\/products\/dorman-m39457-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}