Rubber is out, and silicone is in for your Duramax coolant hoses! A leaking coolant hose can lead to serious engine damage if not quickly identified. Upgrade your cooling system with the Mishimoto 6.6L Duramax silicone coolant hose kit for the perfect combination of performance and durability. Mishimoto Duramax coolant hoses are manufactured with high-grade silicone and four layers of heat-resistant embedded fibers to provide increased pressure and temperature tolerance.

The Mishimoto Duramax coolant hose kit is ideal for use on both stock and modified trucks for any environment or terrain. This hose kit also has billet CNC'ed quick disconnect ends for a direct OEM fitment with absolutely no cutting required. The Mishimoto 6.6L Duramax silicone coolant hose kit, like all of our Duramax performance parts, includes the Mishimoto Lifetime Warranty.​