{"product_id":"dorman-m104458-brake-master-cylinder","title":"Dorman M104458 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for GM Classic Models\u003c\/h2\u003e\u003cp\u003eThe Dorman M104458 Brake Master Cylinder is engineered to restore proper brake hydraulics in select Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac vehicles. Designed with durable aluminum construction and a dual bore design, this master cylinder ensures consistent brake fluid pressure for safe stopping performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac models including Bonneville, Brougham, Camaro, Caprice, Catalina, Custom Cruiser, Delta 88, DeVille, Firebird, Fleetwood, Impala, LeSabre, Parisienne, Regal, and Safari\u003c\/li\u003e\n\u003cli\u003eDual master cylinder bore diameters: 1.125 inches and 1.578 inches for balanced braking\u003c\/li\u003e\n\u003cli\u003eConstructed from corrosion-resistant aluminum for long-lasting durability\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir for brake fluid storage\u003c\/li\u003e\n\u003cli\u003eTwo outlet ports with rearward outlet size 1\/2-20 and secondary outlet thread diameter 9\/16-18\u003c\/li\u003e\n\u003cli\u003eMounting hardware not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman M104458 master cylinder is a critical component in the brake hydraulics system, responsible for converting pedal force into hydraulic pressure. Its aluminum body offers resistance to corrosion and heat, which helps maintain consistent performance over time. The dual bore design with 1.125 inch and 1.578 inch diameters provides balanced pressure distribution to front and rear brakes, enhancing vehicle safety. This master cylinder comes with an integrated reservoir to hold brake fluid, simplifying installation and maintenance. It features two outlets with specific thread sizes (1\/2-20 rearward outlet and 9\/16-18 secondary outlet) to ensure compatibility with original brake lines on various GM vehicles.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Resolution\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores brake pedal firmness and responsiveness in Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac models\u003c\/li\u003e\n\u003cli\u003eEliminates brake fluid leaks caused by worn or damaged master cylinders\u003c\/li\u003e\n\u003cli\u003eResolves inconsistent brake pressure and uneven braking issues\u003c\/li\u003e\n\u003cli\u003eAddresses brake warning light activation due to master cylinder failure\u003c\/li\u003e\n\u003cli\u003ePrevents brake system contamination with a sealed reservoir design\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure brake system is properly bled after installation to remove air pockets\u003c\/li\u003e\n\u003cli\u003eVerify outlet thread sizes (1\/2-20 and 9\/16-18) match vehicle brake lines before installation\u003c\/li\u003e\n\u003cli\u003eMounting hardware is not included; reuse existing hardware or source compatible fasteners\u003c\/li\u003e\n\u003cli\u003eInspect brake lines and hoses for wear or damage during installation\u003c\/li\u003e\n\u003cli\u003eFollow vehicle-specific service manual instructions for safe and correct installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M104458 master cylinder to meet or exceed OEM specifications for fit, form, and function. The aluminum construction and precise bore diameters ensure reliable brake system performance. While mounting hardware is not included, the product is designed for direct replacement in compatible GM vehicles. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43792090562741,"sku":"BKKX-M104458","price":60.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M104458_Fro_34a5c725-a597-40fe-8dda-dae85043db38.jpg?v=1774997533","url":"https:\/\/www.partcatalog.com\/products\/dorman-m104458-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}