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Revmax Allison Transmission Cooler Thermostatic Bypass Upgrade For 17-20 L5P Duramax 2014-2018 silverado 1500 This bolt-on FGXX-668603
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Revmax Allison Transmission Cooler Thermostatic Bypass Upgrade For 17 20 L5P Duramax 2014 2018 silverado 1500 This bolt on FGXX 668603 This bolt on easy to use polymer air fittings You cannot properly flush your cooler lines without the aid of a hot flush machine that can get hot enough to open the bypass valve up Allison 1000 L5P Transmission Cooler Thermostatic Bypass Upgrade
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