2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Fuel System & Fuel Upgrades

Get the most out of your 2020-2025 GM 6.6L Duramax L5P with our selection of Fuel System Upgrades at Alligator Performance! Aftermarket lift pumps help maintain steady fuel pressure and flow, while upgraded Injectors and Injection Pumps provide better fuel delivery for improved power and throttle response. For those looking to increase fuel capacity, Midship and Transfer Tanks offer extended range, making them perfect for long trips or heavy-duty jobs. Additionally, our inventory of Sumps, Accessories, and Additives ensures your fuel system stays optimized for whatever modifications you've already installed. Pair your new fuel upgrades with a premium Exhaust System or some more Engine Upgrades to get the most out of your GM 2500HD/3500HD build. 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.