2020-2022 GM Duramax 6.6L L5P Engine Upgrades

Additional horsepower and torque has never hurt any truck, and your 2020-2022 GM 6.6L Duramax L5P can achieve improved power, response, and performance with any of these premium aftermarket engine parts and upgrades. Here at Alligator Performance, we offer tons of Cold Air Intakes, Tuners, Cooling Upgrades, Fuel Upgrades, and Turbo Upgrades to help you get the most out of your Duramax 2500/3500. Some of these accessories like aftermarket fuel systems and upgraded cold air intakes even help extend engine life for long-lasting functionality without compromise. Whether you're sporting a Sierra 2500, Silverado 3500HD, or anything else in between, make sure not to skip out on the the 6.6L Duramax Transmission and 6.6L Duramax Exhaust Upgrades to ensure your heavy-duty truck will be ready for anything you throw at it. GM Duramax Fitments: 2020, 2021, 2022 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.