WCFAB 2017-2019 L5P Duramax Transmission Cooler Thermostat Bypass Plug CP3 Pump All aluminum construction features large

All aluminum construction features large diameter 4" piping with smooth aerodynamic bends to improve intake air velocity

6L Duramax Stage 2 Intake Kit with Air Box

this transmission cooler is backed up by our Lifetime Warranty with Accident Protection for worry-free cooling as long as you own it

durability improvement that does not change output

buying individually

WCFAB 2017-2019 L5P Duramax Transmission Cooler Thermostat Bypass Plug CP3 Pump All aluminum construction features largeThe 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 and with our built transmissions successfully and are now making them available for