2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Stock & Modified Stock Turbos

The factory turbocharger on your 2020-2025 GM 6.6L Duramax L5P performs well for everyday driving, but when it comes to heavy-duty applications such as towing, hauling, or off-roading, it can start to show its limitations. Upgrading to a modified turbocharger is a great way unlock more power, better throttle response, and improved overall engine performance. If you're looking to maintain your truck’s longevity, we also offer premium factory replacement turbos that deliver reliable, OEM-quality performance that you expect from your Duramax. At Alligator Performance, we work exclusively with trusted and reliable brands, ensuring that every turbocharger we offer meets or exceeds OEM standards for consistent performance and durability. GM Duramax Fitments: 2020, 2021, 2022, 2023, 2024, 2025 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.