{"product_id":"dorman-300-921-secondary-air-injection-pump-pulley","title":"Dorman 300-921 Secondary Air Injection Pump Pulley","description":"\u003ch2\u003eOverview of Dorman Secondary Air Injection Pump Pulley\u003c\/h2\u003e\u003cp\u003eThe Dorman 300-921 Secondary Air Injection Pump Pulley is designed to restore proper function to the air injection system on select Ford vehicles. Engineered from durable steel and finished in black, this pulley is a reliable replacement part for models including the Ford Bronco, F-150, and E-250 Econoline.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from sturdy steel for long-lasting durability\u003c\/li\u003e\n\u003cli\u003eSingle groove design compatible with V-belt systems\u003c\/li\u003e\n\u003cli\u003eWidth measures 1.165 inches for precise fitment\u003c\/li\u003e\n\u003cli\u003eIncludes one mounting hole for secure installation\u003c\/li\u003e\n\u003cli\u003eStandard replacement grade for dependable performance\u003c\/li\u003e\n\u003cli\u003eCompatible with Ford Bronco, F-150, E-150 and E-250 Econoline models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman 300-921 Secondary Air Injection Pump Pulley is a direct replacement part crafted to meet OEM specifications. Its steel construction ensures resistance to wear and heat, while the black finish provides corrosion protection. Featuring a single groove designed for V-belt drive systems, this pulley maintains proper belt alignment and tension. The 1.165-inch width and single mounting hole allow for straightforward installation on compatible Ford vehicles such as the Bronco, F-150, and E-250 Econoline series. This part does not include installation hardware or instructions, so professional installation or prior mechanical knowledge is recommended.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores proper operation of the secondary air injection pump\u003c\/li\u003e\n\u003cli\u003eEliminates belt slippage caused by worn or damaged pulleys\u003c\/li\u003e\n\u003cli\u003ePrevents air injection system failures that can trigger emission control warnings\u003c\/li\u003e\n\u003cli\u003eHelps maintain engine emission standards on Ford Bronco and Econoline models\u003c\/li\u003e\n\u003cli\u003eReplaces pulleys damaged by corrosion or mechanical wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation of the Dorman 300-921 pulley requires removal of the old pulley and alignment with the secondary air injection pump shaft. Since installation hardware and instructions are not included, ensure you have the correct tools and follow vehicle-specific service manuals. Verify belt condition and tension during installation to avoid premature wear. Professional installation is recommended if you are unfamiliar with air injection system components.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eThis Dorman secondary air injection pump pulley is manufactured to meet standard replacement part quality. It undergoes rigorous testing to ensure durability and fitment accuracy for compatible Ford models. While specific warranty details are not provided, Dorman parts typically come with a limited warranty against defects in material and workmanship. Consult the product packaging or Dorman’s official resources for exact warranty terms.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43610904035509,"sku":"BKKY-300-921","price":45.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_300921_Fro_5defe7ce-fbd0-4f4b-8a8d-785a5eb5f7ba.jpg?v=1774983376","url":"https:\/\/www.partcatalog.com\/products\/dorman-300-921-secondary-air-injection-pump-pulley","provider":"PartCatalog","version":"1.0","type":"link"}