2020-2026 GM 2500HD/3500HD 6.6L L5P Duramax Exhaust Upgrades

Upgrade the style, sound, and performance of your 2020-2026 GM 6.6L Duramax L5P with our premium selection of aftermarket exhaust systems here at Alligator Performance. These street-legal and off-road exhaust kits are designed to replace your restrictive factory exhaust components, allowing your engine to breathe easier for improved efficiency. Many of these kits even deliver noticeable gains in both horsepower and torque without the need for extra tuning, giving you an immediate performance boost that you can feel. Beyond power, these exhaust systems add an aggressive tone to your GM Sierra/Silverado 2500HD/3500HD, making every throttle press a heart-pounding experience. Choose from single-exit kits, dual-exit kits, up-pipes, downpipes, and universal exhaust tips to completely transform your truck's exhaust system. And be sure to also check out some additional Engine Upgrades and Intake Upgrades to get even more out of your 6.6L Duramax. GM Duramax Fitments: 2020, 2021, 2022, 2023, 2024, 2025, 2026 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.