{"title":"Coolant Bypass Kits","description":null,"products":[{"product_id":"fleece-performance-universal-pre-formed-5-8in-id-hose-w-90-deg-ends-1in-id-t-fitting","title":"Fleece Performance Universal Pre-Formed 5\/8in ID Hose w\/ 90 Deg. Ends\/1in ID T-Fitting","description":"Fleece Performance Universal Pre-Formed 5\/8in ID Hose w\/ 90 Deg. Ends\/1in ID T-Fitting","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":46886008455417,"sku":"FPEFPE-34258-A","price":32.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/5428\/0953\/files\/2b8b893f399e46f752bd7aafdf1bcc40.jpg?v=1758754683"},{"product_id":"fleece-performance-03-07-dodge-5-9l-cummins-coolant-bypass-kit-03-05-auto-trans","title":"Fleece Performance 03-07 Dodge 5.9L Cummins Coolant Bypass Kit (03-05 Auto Trans)","description":"Another product from Fleece Performance built out of necessity is the 2003-2013 Cummins Coolant Bypass kit. The Cummins engine cooling system was designed to adequately cool a 300-350hp engine. When the horsepower is increased there is an increased demand\u003cbr\u003e\u003ca href=\"https:\/\/d32vzsop7y1h3k.cloudfront.net\/05b0e70ba4a8b4470986c17c1795c2a8.PDF\"\u003eInstallation Instructions\u003c\/a\u003e\u003cbr\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":46886011568377,"sku":"FPEFPE-CLNTBYPS-CUMMINS-0305","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/5428\/0953\/files\/d13239d9eee4201063d3ca84fcc52294.jpg?v=1759732526"},{"product_id":"fleece-performance-03-05-auto-trans-cummins-coolant-bypass-kit-w-stainless-steel-braided-line","title":"Fleece Performance 03-05 Auto Trans Cummins Coolant Bypass Kit w\/ Stainless Steel Braided Line","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIncreased Coolant Flow, Decreased Coolant Temperatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe rear cylinders on the 5.9\/6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure. Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature instead of excessive pressure. This solves the problem before pressure becomes an issue by ensuring consistent temperatures across all six cylinders.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eLowers coolant temperature at the rear cylinders\u003c\/li\u003e\n\u003cli\u003eEnsures consistent temperatures across all cylinders\u003c\/li\u003e\n\u003cli\u003ePrevents damaging coolant pressure build up\u003c\/li\u003e\n\u003cli\u003eComplete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation. Kits for MY 2003+ include billet hose brackets.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWhy do I need a Fleece Performance Coolant Bypass?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eOne of the biggest issues on the 5.9\/6.7L Cummins is the coolant flow problem to the rear cylinders. This can cause catastrophic failure or blow outs of the freeze plugs in an over-temperature \/ over-pressure condition.  The Fleece Performance Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform. \u003c\/p\u003e\n\u003ch3\u003eApplication Notes\u003c\/h3\u003e\n\u003cp\u003eThe 2003 - 2007 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is designed for use in cold climates to warm the transmission fluid with the engine coolant. It is not necessary for use in warm climates or high horsepower applications, nor does it detrimentally affect the trucks performance when removed.\u003c\/p\u003e\n\u003cp\u003eFor model years 2007 - 2018 6.7L trucks, including both automatic and manual equipped transmissions, factory installed transmission fluid heat exchangers are uncommon. For customers with a 6.7L that\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehas\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ea heat exchanger, a heater tube can be purchased at your local Chrysler Dealership [PN:68048997AA] to complete the installation.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003ca href=\"https:\/\/d32vzsop7y1h3k.cloudfront.net\/05b0e70ba4a8b4470986c17c1795c2a8.PDF\"\u003eInstallation Instructions\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":46886011633913,"sku":"FPEFPE-CLNTBYPS-CUMMINS-0305-SS","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/5428\/0953\/files\/cac1d5b6e02976bd9334e7e78f459f38.jpg?v=1758754776"},{"product_id":"fleece-performance-04-5-07-dodge-5-9l-cummins-coolant-bypass-kit-06-07-auto-trans","title":"Fleece Performance 04.5-07 Dodge 5.9L Cummins Coolant Bypass Kit (06-07 Auto Trans)","description":"Another product from Fleece Performance built out of necessity is the 2003-2013 Cummins Coolant Bypass kit. The Cummins engine cooling system was designed to adequately cool a 300-350hp engine. When the horsepower is increased there is an increased demand\u003cbr\u003e\u003ca href=\"https:\/\/d32vzsop7y1h3k.cloudfront.net\/adb047cb44a066840f6e3b606ef9a0a2.PDF\"\u003eInstallation Instructions\u003c\/a\u003e\u003cbr\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":46886011699449,"sku":"FPEFPE-CLNTBYPS-CUMMINS-0607","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/5428\/0953\/files\/16269515c86d8df0c2802eddc2d72344.jpg?v=1758754777"},{"product_id":"fleece-performance-07-5-12-dodge-ram-2500-3500-6-7l-cummins-coolant-bypass-kit","title":"Fleece Performance 07.5-12 Dodge\/RAM 2500\/3500 6.7L Cummins Coolant Bypass Kit","description":"Fleece Performance 07.5-12 Dodge\/RAM 2500\/3500 6.7L Cummins Coolant Bypass Kit","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":46886011830521,"sku":"FPEFPE-CLNTBYPS-CUMMINS-0712","price":399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/5428\/0953\/files\/1ae7c7853f9f3b354668b0199ebe5632.png?v=1758754778"},{"product_id":"fleece-performance-94-98-dodge-5-9l-cummins-12v-coolant-bypass-kit","title":"Fleece Performance 94-98 Dodge 5.9L Cummins 12V Coolant Bypass Kit","description":"Another product from Fleece Performance built out of necessity is the 1998.5-2002 Cummins Coolant Bypass kit. The Cummins engine cooling system was designed to adequately cool a 300-350hp engine. When the horsepower is increased there is an increased dema\u003cbr\u003e\u003ca href=\"https:\/\/d32vzsop7y1h3k.cloudfront.net\/b0ba23729a8aff361844546ea4484a2b.PDF\"\u003eInstallation Instructions\u003c\/a\u003e\u003cbr\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":46886011896057,"sku":"FPEFPE-CLNTBYPS-CUMMINS-12V","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/5428\/0953\/files\/59a8768bd6210aa1c0a88d31474b3cb5.jpg?v=1758754779"},{"product_id":"fleece-performance-13-18-ram-2500-3500-6-7l-cummins-coolant-bypass-kit","title":"Fleece Performance 13-18 RAM 2500\/3500 6.7L Cummins Coolant Bypass Kit","description":"\u003cp\u003eThe Fleece Performance Coolant Bypass for the 2013-2018 RAM with 6.7L Cummins seamlessly integrates with your truck for an OE fit-and-finish. \u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIncreased Coolant Flow, Decreased Coolant Temperatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe rear cylinders on the 6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure. Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature instead of excessive pressure. This solves the problem before pressure becomes an issue by ensuring consistent temperatures across all six cylinders.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLowers coolant temperature at the rear cylinders\u003c\/li\u003e\n\u003cli\u003eEnsures consistent temperatures across all cylinders\u003c\/li\u003e\n\u003cli\u003ePrevents damaging coolant pressure build up\u003c\/li\u003e\n\u003cli\u003eComplete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWhy do I need a Fleece Performance Coolant Bypass?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eOne of the biggest issues on the 6.7L Cummins is the coolant flow problem to the rear cylinders. This can cause catastrophic failure or blow outs of the freeze plugs in an over-temperature \/ over-pressure condition.  The Fleece Performance Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKit Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRear coolant bypass thermostat housing\u003c\/li\u003e\n\u003cli\u003eFront coolant bypass thermostat housing\u003c\/li\u003e\n\u003cli\u003eNew EGR cross-over tube gaskets\u003c\/li\u003e\n\u003cli\u003eBlack braided nylon coolant bypass hose with protective high temperature sleeve and AN fittings\u003c\/li\u003e\n\u003cli\u003eMounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"fleeceperformance.com\/media\/wysiwyg\/FPE-2022-84-FPE-CLNTBYPS-CUMMINS-0712_1318.pdf\"\u003eInstallation Instructions\u003c\/a\u003e\u003c\/p\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":46886012059897,"sku":"FPEFPE-CLNTBYPS-CUMMINS-1318","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/5428\/0953\/files\/1e6788356d7a2cce9e1dcdebbd67de8c.png?v=1758754794"},{"product_id":"fleece-performance-03-07-dodge-5-9l-04-5-12-6-7l-cummins-coolant-bypass-kit-03-07-manual-trans","title":"Fleece Performance 03-07 Dodge 5.9L \/ 04.5-12 6.7L Cummins Coolant Bypass Kit (03-07 Manual Trans)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIncreased Coolant Flow, Decreased Coolant Temperatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe rear cylinders on the 5.9L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure. Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature instead of excessive pressure. This solves the problem before pressure becomes an issue by ensuring consistent temperatures across all six cylinders.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eLowers coolant temperature at the rear cylinders\u003c\/li\u003e\n\u003cli\u003eEnsures consistent temperatures across all cylinders\u003c\/li\u003e\n\u003cli\u003ePrevents damaging coolant pressure build up\u003c\/li\u003e\n\u003cli\u003eComplete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWhy do I need a Fleece Performance Coolant Bypass?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eOne of the biggest issues on the 5.9L Cummins is the coolant flow problem to the rear cylinders. This can cause catastrophic failure or blow outs of the freeze plugs in an over-temperature \/ over-pressure condition.  The Fleece Performance Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eApplication Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 2003 - 2007 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is designed for use in cold climates to warm the transmission fluid with the engine coolant. It is not necessary for use in warm climates or high horsepower applications, nor does it detrimentally affect the trucks performance when removed.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/d32vzsop7y1h3k.cloudfront.net\/05cfbe3f55eb736fa37d505dbbeb20eb.PDF\"\u003eInstallation Instructions\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":46886012223737,"sku":"FPEFPE-CLNTBYPS-CUMMINS-MAN","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/5428\/0953\/files\/228fe1371e290f83a63ed6ea749dc323.jpg?v=1758754672"},{"product_id":"fleece-performance-03-07-manual-transmission-cummins-coolant-bypass-kit-w-ss-braided-line","title":"Fleece Performance 03-07 Manual Transmission Cummins Coolant Bypass Kit w\/ SS Braided Line","description":"\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIncreased Coolant Flow, Decreased Coolant Temperatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe rear cylinders on the 5.9L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure. Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature instead of excessive pressure. This solves the problem before pressure becomes an issue by ensuring consistent temperatures across all six cylinders.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eLowers coolant temperature at the rear cylinders\u003c\/li\u003e\n\u003cli\u003eEnsures consistent temperatures across all cylinders\u003c\/li\u003e\n\u003cli\u003ePrevents damaging coolant pressure build up\u003c\/li\u003e\n\u003cli\u003eComplete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e \u003cspan\u003e\u003cstrong\u003eWhy do I need a Fleece Performance Coolant Bypass?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eOne of the biggest issues on the 5.9L Cummins is the coolant flow problem to the rear cylinders. This can cause catastrophic failure or blow outs of the freeze plugs in an over-temperature \/ over-pressure condition.  The Fleece Performance Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform. \u003c\/p\u003e\n\u003cp\u003e   *US Trademark Reg. No. 6099979, 6099980, 6099981 and 7659022.\u003c\/p\u003e\n\u003cp\u003e Application Notes\u003c\/p\u003e\n\u003cp\u003eThe 2003 - 2007 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is designed for use in cold climates to warm the transmission fluid with the engine coolant. It is not necessary for use in warm climates or high horsepower applications, nor does it detrimentally affect the trucks performance when removed.\u003c\/p\u003e\n\u003cp\u003e Warranty\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"warranty\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cdiv\u003e\u003ca href=\"https:\/\/www.fleeceperformance.com\/media\/wysiwyg\/FleecePerformanceEngineering_Warranty.pdf\" target=\"_blank\"\u003e1 Year Limited Parts Warranty\u003c\/a\u003e\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/d32vzsop7y1h3k.cloudfront.net\/05cfbe3f55eb736fa37d505dbbeb20eb.PDF\"\u003eInstallation Instructions\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":46886012289273,"sku":"FPEFPE-CLNTBYPS-CUMMINS-MAN-SS","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/5428\/0953\/files\/fpe-clntbyps-cummins-man-ss.jpg?v=1767919030"},{"product_id":"fleece-performance-98-5-02-dodge-5-9l-cummins-vp-coolant-bypass-kit","title":"Fleece Performance 98.5-02 Dodge 5.9L Cummins VP Coolant Bypass Kit","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIncreased Coolant Flow, Decreased Coolant Temperatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe rear cylinders on the 5.9\/6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure. Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature instead of excessive pressure. This solves the problem before pressure becomes an issue by ensuring consistent temperatures across all six cylinders.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eLowers coolant temperature at the rear cylinders\u003c\/li\u003e\n\u003cli\u003eEnsures consistent temperatures across all cylinders\u003c\/li\u003e\n\u003cli\u003ePrevents damaging coolant pressure build up\u003c\/li\u003e\n\u003cli\u003eComplete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation. Kits for MY 2003+ include billet hose brackets.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWhy do I need a Fleece Performance Coolant Bypass?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eOne of the biggest issues on the 5.9\/6.7L Cummins is the coolant flow problem to the rear cylinders. This can cause catastrophic failure or blow outs of the freeze plugs in an over-temperature \/ over-pressure condition.  The Fleece Performance Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform. \u003c\/p\u003e\n\u003ch3\u003eApplication Notes\u003c\/h3\u003e\n\u003cp\u003eThe 2003 - 2007 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is designed for use in cold climates to warm the transmission fluid with the engine coolant. It is not necessary for use in warm climates or high horsepower applications, nor does it detrimentally affect the trucks performance when removed.\u003c\/p\u003e\n\u003cp\u003eFor model years 2007 - 2018 6.7L trucks, including both automatic and manual equipped transmissions, factory installed transmission fluid heat exchangers are uncommon. For customers with a 6.7L that\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehas\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ea heat exchanger, a heater tube can be purchased at your local Chrysler Dealership [PN:68048997AA] to complete the installation.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003ca href=\"https:\/\/d32vzsop7y1h3k.cloudfront.net\/29d390687d1378bec2f444313097e175.PDF\"\u003eInstallation Instructions\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":46886012420345,"sku":"FPEFPE-CLNTBYPS-CUMMINS-VP","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/5428\/0953\/files\/vpblk_small_2.jpg?v=1767407935"},{"product_id":"fleece-performance-98-5-02-vp-coolant-bypass-kit-w-stainless-steel-braided-line","title":"Fleece Performance 98.5-02 VP Coolant Bypass Kit w\/ Stainless Steel Braided Line","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIncreased Coolant Flow, Decreased Coolant Temperatures\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe rear cylinders on the 5.9\/6.7L Cummins suffer from a lack of coolant flow, and therefore, experience the highest coolant temperatures. This can cause excessive pressure to build in the cooling system, especially the rear of the block and blow out freeze plugs externally, or the smaller diameter plugs under the valve cover, leading to a failure. Our coolant bypass kit adds a secondary thermostat, that unlike other brands, works based on temperature instead of excessive pressure. This solves the problem before pressure becomes an issue by ensuring consistent temperatures across all six cylinders.\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eBenefits:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eLowers coolant temperature at the rear cylinders\u003c\/li\u003e\n\u003cli\u003eEnsures consistent temperatures across all cylinders\u003c\/li\u003e\n\u003cli\u003ePrevents damaging coolant pressure build up\u003c\/li\u003e\n\u003cli\u003eComplete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation. Kits for MY 2003+ include billet hose brackets.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eWhy do I need a Fleece Performance Coolant Bypass?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eOne of the biggest issues on the 5.9\/6.7L Cummins is the coolant flow problem to the rear cylinders. This can cause catastrophic failure or blow outs of the freeze plugs in an over-temperature \/ over-pressure condition.  The Fleece Performance Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform. \u003c\/p\u003e\n\u003cdiv class=\"product attribute description\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003ch3\u003eApplication Notes\u003c\/h3\u003e\n\u003cp\u003eThe 2003 - 2007 5.9L automatic transmission version will eliminate the factory transmission fluid heat exchanger. The heat exchanger is designed for use in cold climates to warm the transmission fluid with the engine coolant. It is not necessary for use in warm climates or high horsepower applications, nor does it detrimentally affect the trucks performance when removed.\u003c\/p\u003e\n\u003cp\u003eFor model years 2007 - 2018 6.7L trucks, including both automatic and manual equipped transmissions, factory installed transmission fluid heat exchangers are uncommon. For customers with a 6.7L that\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ehas\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ea heat exchanger, a heater tube can be purchased at your local Chrysler Dealership [PN:68048997AA] to complete the installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"warranty\"\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.fleeceperformance.com\/media\/wysiwyg\/FleecePerformanceEngineering_Warranty.pdf\" target=\"_blank\"\u003e1 Year Limited Parts Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cbr\u003e\u003ca href=\"https:\/\/d32vzsop7y1h3k.cloudfront.net\/29d390687d1378bec2f444313097e175.PDF\"\u003eInstallation Instructions\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":46886012485881,"sku":"FPEFPE-CLNTBYPS-CUMMINS-VP-SS","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/5428\/0953\/files\/vpss_1.jpg?v=1767830878"},{"product_id":"fleece-performance-13-16-dodge-6-7l-cummins-2nd-gen-swap-kit-a-c-line-reroute-kit","title":"Fleece Performance 13-16 Dodge 6.7L Cummins 2nd Gen Swap Kit A\/C Line Reroute Kit","description":"\u003cp\u003e\u003cspan\u003eIf you are looking to do an aftermarket turbo set up or compound turbo set up then this kit is a must! Our A\/C line reroute kit allows you to create additional room to get your kit installed properly and cleanly. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.fleeceperformance.com\/mwdownloads\/download\/link\/id\/108\"\u003e\u003cspan\u003eInstallation Instructions\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":46918736118009,"sku":"FPEFPE-AC-KIT-1316","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/5428\/0953\/files\/28ee0397f46ec147e7364cb4c6e935ef.jpg?v=1759879663"}],"url":"https:\/\/octanehaus.com\/collections\/coolant-bypass-kits.oembed","provider":"Octane Haus","version":"1.0","type":"link"}