2017-2019 GM 2500HD/3500HD 6.6L L5P Duramax Intercoolers

One of the best upgrades you can make on your 2017-2019 GM 6.6L Duramax is the addition of an aftermarket Intercooler! Here at Alligator Performance, we carry a ton of Intercooler upgrades that will help unlock the full potential hidden under the hood of your Sierra/Silverado. A new intercooler will offer more efficient flow-through operation and faster heat dissipation to help improve any issues associated to restricted airflow. By allowing your engine to breather easier, you'll experience a solid improvement in both power and performance whether you're towing a trailer, ripping through the desert, or passing someone at highway speeds. Take your truck even further by investing in a new Cold Air Intake or some additional Transmission Upgrades, and start adventuring like the pros. GM Duramax Fitments: 2017, 2018, 2019 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.