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The Mishimoto full-flow transmission thermal bypass valve kit is a direct-fit upgrade for 2012–2018 Jeep Wrangler JK models, replacing the stock thermostatic bypass with an all-aluminum CNC-machined housing. The full-flow design allows fluid to circulate through the cooler immediately, eliminating the stock restriction and improving cooling reliability in hot climates, extreme use, or towing. Direct-fit and installs in under an hour; includes Mishimoto Lifetime Warranty.
Mishimoto Mopar Pentastar / Hemi Thermal Bypass Valve Upgrade
