2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Air Intakes & Intercoolers

Unlock more performance hidden under the hood of your 2020-2025 GM 6.6L Duramax L5P with these premium air intake and intercooler upgrades from Alligator Performance! In this section, you'll find a range of cold air intakes, replacement filters, cleaning kits, intercoolers, and intercooler pipes and accessories—all designed to improve airflow, boost engine efficiency, and maximize horsepower. Whether you're looking for a simple filter upgrade or a complete intercooler system overhaul, these upgrades will help your GM 2500HD/3500HD handle everything from daily driving to extreme towing and off-road adventures. Pair your new intake upgrades with some additional Engine Upgrades or Exhaust Upgrades for an even more thrilling driving experience.  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.