{"product_id":"d-series-d16-upper-coolant-fill-neck-an16-male-outlet","title":"D-Series D16 Upper Coolant Fill Neck AN16 Male Outlet","description":"\u003cdiv style=\"text-align: center;\"\u003e\n\u003ch1\u003eD-Series Upper Coolant Fill Neck – AN16 Male Outlet\u003c\/h1\u003e\n\u003cp class=\"isSelectedEnd\"\u003eProper cooling system maintenance starts with having a convenient and effective fill point. The\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBull Boost Performance D-Series Upper Coolant Fill Neck\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis designed to relocate the coolant fill location to the highest point in the system, making coolant refills, air bleeding, and routine maintenance significantly easier.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003ePerfect for custom radiator installations, tucked engine bays, turbocharged setups, and race vehicles, this fill neck helps eliminate trapped air while promoting more efficient cooling system operation. The integrated design allows for simplified servicing while providing a clean, professional appearance under the hood.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003eConstructed from high-quality TIG-welded aluminum, this coolant fill neck features a standard radiator cap mounting flange, an integrated overflow fitting, and a male\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eAN16 outlet\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor compatibility with a wide range of custom cooling system configurations.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003eDesigned for D-Series engine applications\u003c\/li\u003e\n\u003cli\u003eFits D16 engines\u003c\/li\u003e\n\u003cli\u003eAN16 male outlet for custom cooling system plumbing\u003c\/li\u003e\n\u003cli\u003eStandard radiator cap mounting flange\u003c\/li\u003e\n\u003cli\u003eTIG-welded aluminum construction\u003c\/li\u003e\n\u003cli\u003eIntegrated overflow fitting included\u003c\/li\u003e\n\u003cli\u003eLightweight and corrosion-resistant design\u003c\/li\u003e\n\u003cli\u003eSimplifies coolant filling and air bleeding\u003c\/li\u003e\n\u003cli\u003eIdeal for custom radiators and tucked cooling systems\u003c\/li\u003e\n\u003cli\u003ePerfect for street, race, turbocharged, and engine swap applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEngineering \u0026amp; Construction\u003c\/h2\u003e\n\u003ch3\u003eHigh-Quality Aluminum Construction\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003eManufactured from durable aluminum materials to provide long-lasting performance, corrosion resistance, and reduced weight.\u003c\/p\u003e\n\u003ch3\u003eTIG-Welded Assembly\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003eProfessionally welded for maximum strength, reliability, and leak-free operation under demanding conditions.\u003c\/p\u003e\n\u003ch3\u003eOptimized Cooling System Serviceability\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003eRelocates the coolant fill point to improve system bleeding and help remove trapped air pockets commonly found in modified cooling systems.\u003c\/p\u003e\n\u003ch3\u003eCustom Cooling System Ready\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003eDesigned to work with AN16 plumbing commonly used in performance and motorsport cooling system configurations.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003eMaterial: Aluminum\u003c\/li\u003e\n\u003cli\u003eFinish: Silver\u003c\/li\u003e\n\u003cli\u003eOutlet Size: AN16 Male\u003c\/li\u003e\n\u003cli\u003eOverflow Port: Included\u003c\/li\u003e\n\u003cli\u003eRadiator Cap Compatibility: Standard Radiator Cap\u003c\/li\u003e\n\u003cli\u003eConstruction: TIG Welded\u003c\/li\u003e\n\u003cli\u003eCondition: Brand New\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePackage Includes\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e(1) D-Series Upper Coolant Fill Neck\u003c\/li\u003e\n\u003cli\u003e(1) Overflow\/Vacuum Barb Fitting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003eFits D16 engine applications\u003c\/li\u003e\n\u003cli\u003eCompatible with custom AN16 cooling system setups\u003c\/li\u003e\n\u003cli\u003eSuitable for custom radiator installations\u003c\/li\u003e\n\u003cli\u003eIdeal for tucked radiator configurations\u003c\/li\u003e\n\u003cli\u003eDesigned for performance, racing, and engine swap projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003eProfessional installation is recommended.\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003ePlease verify hose routing, fitting compatibility, and mounting hardware requirements prior to installation. Factory hardware may not be compatible with all applications.\u003c\/p\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eBull Boost Performance D-Series Upper Coolant Fill Neck\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprovides a clean, functional solution for custom cooling systems, making maintenance easier while improving the overall appearance and serviceability of your engine bay.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bull Boost Performance","offers":[{"title":"Default Title","offer_id":51110598869212,"sku":"729859401935","price":129.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/3005\/6412\/files\/Coolant-Fill-Neck-CM243.jpg?v=1781208207","url":"https:\/\/bullboostperformance.com\/products\/d-series-d16-upper-coolant-fill-neck-an16-male-outlet","provider":"Bull Boost Performance","version":"1.0","type":"link"}