Mishimoto is proud to expand their Cummins performance line to include the 6.7L Cummins Silicone Coolant Hose Kit. Treat your stock or modified Cummins to an upgrade in reliability with Mishimoto Dodge Ram radiator hoses engineered specifically for the 2013 - 2014 6.7L. This Cummins performance kit replaces the factory upper and lower Cummins radiator hoses with 100 - percent silicone components. Mishimoto Cummins radiator hoses are constructed from high - grade 4 - ply silicone with heat - resistant embedded fibers for superior heat and pressure tolerance. Silicone hoses are far more durable, reliable, and less prone to degradation than the factory rubber Cummins coolant hoses. Similar to the factory lower hose, the Mishimoto lower Dodge Ram radiator hose utilizes an internal spring to prevent hose collapse. These Cummins coolant hoses are available in red, black, or blue and like all of our Cummins performance parts, includes with the Mishimoto Lifetime Warranty.