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Mishimoto full-flow thermal bypass valve kit for 2017–2019 Chevrolet/GMC 6.6L Duramax L5P eliminates the stock thermostat to provide constant full flow to the transmission cooler. CNC-machined billet construction, machined internal passages and cooling fins improve cooling efficiency, making this kit suitable for warm climates, heavy towing or extreme use. It ships in a black anodized finish with Mishimoto's lifetime warranty.
Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit
