{"product_id":"upper-coolant-pipe-for-2011-2016-lml-6-6l-duramax-radiator-pipe-spelab","title":"Upper Coolant Pipe for 2011-2016 LML 6.6L Duramax Radiator Pipe | SPELAB","description":"\u003cp\u003e---tab Description---\u003c\/p\u003e\n\u003ch2\u003eUpper Coolant Tube For 2011-2016 LML 6.6L Duramax Coolant Pipe Kit\u003c\/h2\u003e\n\u003cp\u003eThe SPELAB Upper Coolant Tube is a premium upgrade designed to replace the factory plastic and rubber upper radiator hose on your 2011–2016 LML 6.6L Duramax. Built from high-grade 6061 aluminum with heavy-duty multi-ply silicone couplers, this system eliminates the failure-prone OEM parts and delivers long-lasting durability, clean aesthetics, and improved cooling reliability under heavy load or tuned conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0174\/0609\/9556\/files\/04_053f0fb1-e602-4b1a-8512-70006e1d8b58.jpg?v=1773989700\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0174\/0609\/9556\/files\/Upper_Coolant_Tube_For_2017-2025_L5P_Duramax_Coolant_Pipe_Kit_SPELAB-6.jpg?v=1773990581\" alt=\"Upper Coolant Tube  For 2017-2025 L5P Duramax Coolant Pipe Kit  | SPELAB\"\u003e\u003c\/p\u003e\n\u003ch2\u003eLML Upper Coolant Tube Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e6061-T6 Aluminum Construction\u003c\/strong\u003e\u003cbr\u003eMandrel-bent aluminum tubing resists heat, pressure, and aging far better than OEM rubber.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC-Machined Thermostat Housing \u0026amp; Radiator Adapter\u003c\/strong\u003e\u003cbr\u003eEnsures a perfect leak-free connection and long-term durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePowder-Coated Finish (Multiple Colors Available)\u003c\/strong\u003e\u003cbr\u003eDurable, corrosion-resistant coating adds a premium look to your engine bay.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Bolt-On Installation\u003c\/strong\u003e\u003cbr\u003eNo cutting or fabrication required — designed as a direct replacement for your factory upper coolant tube assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0174\/0609\/9556\/files\/03_146f2d69-a413-4764-96cf-b9a7979fe5a0.jpg?v=1773989700\"\u003e\u003c\/p\u003e\n\u003ch2\u003eUpper Coolant Tube Specification\u003c\/h2\u003e\n\u003ctable style=\"width: 99.9589%;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.3094%;\"\u003eMaterial\u003c\/td\u003e\n\u003ctd style=\"width: 65.5489%;\"\u003e 6061-T6 Aluminum Construction \u0026amp; Silicone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.3094%;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"width: 65.5489%;\"\u003e1.5 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 34.3094%;\"\u003eInstallation\u003c\/td\u003e\n\u003ctd style=\"width: 65.5489%;\"\u003e Engine block or thermostat housing to the upper radiator section\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat's in the BOX?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × Aluminum upper coolant tube\u003c\/li\u003e\n\u003cli\u003e2 × Silicone couplers\u003c\/li\u003e\n\u003cli\u003e4 × Stainless steel T-bolt clamps\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e---tab Fitment \u0026amp; FAQ---\u003c\/p\u003e\n\u003ch2\u003eThis Upper Coolant Tube Fit:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e2011-2016 LML 6.6L Duramax Diesel GMC Sierra 2500 HD\u003c\/li\u003e\n\u003cli\u003e2011-2016 LML 6.6L Duramax Diesel GMC Sierra 3500 HD\u003c\/li\u003e\n\u003cli\u003e2011-2016 LML 6.6L Duramax Diesel Chevrolet Silverado 2500 HD\u003c\/li\u003e\n\u003cli\u003e2011-2016 LML 6.6L Duramax Diesel Chevrolet Silverado 3500 HD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection\u003e\n\u003ch2\u003eFAQS\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt\u003e\u003cstrong\u003eWhy should I upgrade my 2011-2016 LML Duramax to an aluminum upper coolant tube?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eThe factory upper radiator hose on LML engines uses failure-prone plastic and rubber components. SPELAB's 6061-T6 aluminum tube eliminates these OEM weaknesses, providing superior durability and reliability under heavy load or tuned conditions.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eIs this kit compatible with Silverado and Sierra 2500HD\/3500HD trucks?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes, this kit is specifically engineered for 2011-2016 Chevrolet Silverado 2500HD\/3500HD and GMC Sierra 2500HD\/3500HD trucks equipped with the 6.6L LML Duramax Diesel engine.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eDoes the SPELAB LML coolant pipe require any modifications for installation?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eNo, this is a direct bolt-on replacement. It utilizes CNC-machined thermostat housing and radiator adapters to ensure a perfect, leak-free fit without any cutting or fabrication required.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eWhat are the benefits of the mandrel-bent aluminum construction?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eMandrel-bent aluminum tubing maintains a consistent diameter throughout bends, which reduces flow resistance and withstands heat and pressure far better than standard rubber hoses, helping to prevent major engine failures.\u003c\/dd\u003e\n\u003cdt\u003e\u003cstrong\u003eCan this modification help reduce engine operating temperatures?\u003c\/strong\u003e\u003c\/dt\u003e\n\u003cdd\u003eYes, by replacing the restrictive factory hose with high-grade aluminum tubing, this modification can help improve cooling efficiency and potentially reduce engine operating temperatures by approximately 20–25°F (11–14°C) under heavy use.\u003c\/dd\u003e\n\u003c\/dl\u003e\n\u003c\/section\u003e\n\u003cp\u003e---tab Blog \u0026amp; Video---\u003c\/p\u003e\n\u003ch2\u003eVideo about LML Upper Coolant Tube\u003c\/h2\u003e\n\u003cdiv class=\"video-slider-wrapper\"\u003e\n\u003cdiv class=\"video-slider\"\u003e\n\u003cdiv class=\"video-item\" data-video-id=\"hdGGEU1ZpdE\"\u003e\n\u003cdiv class=\"video-item-inner\"\u003e\n\u003cimg src=\"https:\/\/img.youtube.com\/vi\/hdGGEU1ZpdE\/hqdefault.jpg\" alt=\"Video Thumbnail 0\" class=\"video-thumbnail\"\u003e\n\u003cdiv class=\"play-icon\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"video-details\"\u003e\n\u003ch3 class=\"video-title\"\u003eReduce engine operating temperature through modifications (by approximately 20–25°F ≈ 11–14°C)!\u003c\/h3\u003e\n\u003cdiv class=\"video-tags\"\u003e\n\u003cspan class=\"tag\"\u003ePerformance Upgrade\u003c\/span\u003e\u003cspan class=\"tag\"\u003eInstallation Guide\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"video-item\" data-video-id=\"e26R6fFKuRc\"\u003e\n\u003cdiv class=\"video-item-inner\"\u003e\n\u003cimg src=\"https:\/\/img.youtube.com\/vi\/e26R6fFKuRc\/hqdefault.jpg\" alt=\"Video Thumbnail 0\" class=\"video-thumbnail\"\u003e\n\u003cdiv class=\"play-icon\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"video-details\"\u003e\n\u003ch3 class=\"video-title\"\u003eOE = Weakness → Aluminum Coolant Tube = Improved reliability + Prevention of major failures\u003c\/h3\u003e\n\u003cdiv class=\"video-tags\"\u003e\n\u003cspan class=\"tag\"\u003eFailure Prevention\u003c\/span\u003e\u003cspan class=\"tag\"\u003eInstallation Guide\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"video-modal\" id=\"videoModal\"\u003e\n\u003cdiv class=\"video-modal-content\"\u003e\n\u003cspan class=\"video-modal-close\"\u003e×\u003c\/span\u003e\n\u003cdiv class=\"video-modal-player-wrapper\"\u003e\u003ciframe id=\"youtubePlayer\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e---tab Shipping \u0026amp; Returns---\u003c\/p\u003e\n\u003cdiv class=\"policy-container\"\u003e\n\u003cdiv class=\"policy-item\"\u003e\n\u003ch3\u003eFast Shipping Policy\u003c\/h3\u003e\n\u003cp\u003eYour order will be dispatched within \u003cstrong\u003e1-2 business days\u003c\/strong\u003e, and the package will arrive within your order's estimated date. \u003ca href=\"https:\/\/www.spelabautoparts.com\/pages\/shipping-policy\"\u003eClick for Shipping Policy\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"policy-item\"\u003e\n\u003ch3\u003eEasy Return Policy\u003c\/h3\u003e\n\u003cp\u003eEvery order comes with a \u003cstrong\u003e14-day free return\u003c\/strong\u003e, which means you don't have to pay for a return slip. \u003ca href=\"https:\/\/www.spelabautoparts.com\/pages\/refund-policy\"\u003eClick for Return Policy\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SPELAB","offers":[{"title":"Black","offer_id":48552614658299,"sku":"SPBVL0001002","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Red","offer_id":48552614691067,"sku":"SPBVL0001003","price":149.0,"currency_code":"USD","in_stock":true},{"title":"Silver","offer_id":48552614723835,"sku":"SPBVL0001001","price":149.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/0609\/9556\/files\/Upper_Coolant_Pipe_for_2011-2016_LML_6.6L_Duramax_Radiator_Pipe_SPELAB-1.jpg?v=1780072880","url":"https:\/\/www.spelabautoparts.com\/products\/upper-coolant-pipe-for-2011-2016-lml-6-6l-duramax-radiator-pipe-spelab","provider":"SPELAB","version":"1.0","type":"link"}