{"product_id":"2003-2007-cummins-coolant-bypass-kit","title":"2003-2007 CUMMINS COOLANT BYPASS KIT","description":"\u003ch2\u003eCoolant Bypass Kit | 2003–2007 Dodge\/Ram Cummins 5.9L\u003c\/h2\u003e\u003cp\u003eProtect your 5.9L Cummins from premature injector cup and cylinder head failures with the Fleece Performance Coolant Bypass Kit. Designed for 2003–2007 Dodge\/Ram 2500\/3500 trucks, this kit reroutes coolant flow to eliminate the factory design flaw that allows hot, stagnant coolant to sit around the injector cups — one of the leading causes of cup erosion, coolant contamination, and catastrophic head damage on the 5.9L common rail Cummins.\u003c\/p\u003e\u003ch3\u003eWhy You Need a Coolant Bypass Kit\u003c\/h3\u003e\u003cp\u003eThe 2003–2007 5.9L Cummins has a known issue where coolant flow through the cylinder head becomes restricted and stagnant around the injector cups. This localized overheating accelerates injector cup erosion, allowing coolant to enter the combustion chamber and fuel system. Left unaddressed, it leads to white smoke, hydrolocking, and expensive head repairs. The Fleece coolant bypass kit keeps coolant moving, reducing heat soak and dramatically extending the life of your injector cups and head gasket.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEliminates stagnant coolant flow around injector cups\u003c\/li\u003e\n\u003cli\u003eReduces localized overheating in the cylinder head\u003c\/li\u003e\n\u003cli\u003eExtends injector cup and cylinder head life\u003c\/li\u003e\n\u003cli\u003eHelps prevent coolant contamination of the fuel system\u003c\/li\u003e\n\u003cli\u003eComplete kit with all necessary hardware for installation\u003c\/li\u003e\n\u003cli\u003eFrom Fleece Performance — a trusted name in Cummins performance and reliability\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2003–2004 Dodge Ram 2500\/3500 Cummins 5.9L CR\u003c\/li\u003e\n\u003cli\u003e2004.5–2007 Dodge Ram 2500\/3500 Cummins 5.9L CR\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis is one of the best preventive maintenance upgrades you can do on a 5.9L common rail Cummins. Don't wait for injector cup failure — install the bypass kit and keep your engine protected.\u003c\/p\u003e","brand":"Fleece","offers":[{"title":"Default Title","offer_id":54611892207908,"sku":"FPE-CLNTBYPS-CUMMINS-MAN","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0975\/7202\/8708\/files\/FPE-CLNTBYPS-CUMMINS-MAN_1_thmb.jpg?v=1781123235","url":"https:\/\/autodieselsystems.com\/products\/2003-2007-cummins-coolant-bypass-kit","provider":"Auto Diesel Systems","version":"1.0","type":"link"}