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Unlocked & Tuned
These upgraded pipes address that issue with thicker
Built to last with 409 stainless steel construction
0 - 220HP POWER LEVELS
2017-2019 L5P Transmission Cooler Thermostat Bypass Plug car air freshener Unlocked & Tuned2017 2019 L5P Duramax Billet Anodized Transmission Cooler Thermostat Bypass Plug, The stock thermostatic bypass for warming up the Allison quickly in cold weather conditions is a good idea in principle, but in practice we've seen the valve fail forcing trans fluid around the cooler in warm weather conditions that cause dangerous fluid temperatures for built and stock transmissions alike. We've been running this design on our shop development trucks
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