{"product_id":"fleece-performance-cummins-coolant-bypass-kit-with-stainless-steel-braided-line-2003-2007-manual-transmission","title":"Fleece Performance Cummins Coolant Bypass Kit with Stainless Steel Braided Line (2003-2007 Manual Transmission)","description":"Increased Coolant Flow, Decreased Coolant Temperatures The 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. Benefits: Lowers coolant temperature at the rear cylinders Ensures consistent temperatures across all cylinders Prevents damaging coolant pressure build up Complete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation. Why do I need a Fleece Coolant Bypass? One 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 Coolant Bypass is one of the most important additions you make to improve the reliability and longevity of the Cummins platform.\nCummins Coolant Bypass Kit (2003-2007 Manual Transmission) w\/ Stainless Steel Braided Line\n\u003cul\u003e\n  \u003cli\u003eComplete kit comes with braided hose and AN O-ring fittings to ensure a leak-free installation\u003c\/li\u003e\n  \u003cli\u003eEnsures consistent temperatures across all cylinders\u003c\/li\u003e\n  \u003cli\u003eLowers coolant temperature at the rear cylinders\u003c\/li\u003e\n  \u003cli\u003ePrevents damaging coolant pressure build up\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Fleece Performance Cummins Coolant Bypass Kit (Part Number: FPE-CLNTBYPS-CUMMINS-MAN-SS) is designed to enhance the cooling system of 5.9L and 6.7L Cummins engines from 2003 to 2007 with manual transmissions. This comprehensive kit features a secondary thermostat that operates based on temperature, unlike traditional pressure-based systems, providing precise control over coolant flow. By maintaining consistent temperatures across all cylinders, especially the rear ones prone to overheating, this kit helps prevent excessive pressure buildup that can cause freeze plug failures or engine damage. The installation includes durable braided stainless steel hose and AN O-ring fittings, ensuring a leak-free connection and long-term reliability. Proper coolant flow is critical for engine longevity, and this bypass kit addresses common issues associated with uneven cooling, reducing the risk of catastrophic failures under high-temperature conditions. Its design improves overall engine reliability, making it a vital upgrade for Cummins owners seeking to optimize engine performance and durability.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eComplete kit includes braided stainless steel hose and AN O-ring fittings for a secure, leak-free installation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eEnsures consistent coolant temperatures across all cylinders, especially at the rear\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eReduces coolant temperature at the rear cylinders to prevent overheating\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003ePrevents damaging coolant pressure buildup that can lead to freeze plug blowouts\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eDesigned specifically for 2003-2007 Cummins engines with manual transmissions\u003c\/li\u003e\u003c\/ul\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbdoy\u003e\n\u003ctr\u003e\u003ctd\u003eAir Freight Prohibited: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eNot Carb Approved: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLtl Freight Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eProp 65: Y\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003ePart Type: automotive\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eEpa: Compliant\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCarb Acknowledgement Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCarb Eo Number: D-834-9\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eRegular Stock: t\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eUnits Per Sku: 1\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbdoy\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Fleece Performance","offers":[{"title":"Default Title","offer_id":53604241670417,"sku":"FPE-CLNTBYPS-CUMMINS-MAN-SS","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/3830\/0689\/files\/0f9515ff3ef21645766fcbd227d30c5a.jpg?v=1779978896","url":"https:\/\/shoprenegade.com\/products\/fleece-performance-cummins-coolant-bypass-kit-with-stainless-steel-braided-line-2003-2007-manual-transmission","provider":"Renegade Speed by Renegade Racing \u0026 Performance","version":"1.0","type":"link"}