2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Mufflers

Enhance the overall sound of your 2020-2025 GM 6.6L Duramax L5P with our selection of universal mufflers at Alligator Performance! These mufflers are designed to replace your stock system, offering improved exhaust flow, reduced backpressure, and a more aggressive exhaust note. Whether you want a deep, throaty growl or a subtle performance tone, these universal mufflers can help you achieve the sound you’re after while slightly boosting horsepower and torque. Pair them with a Single-Exit Kit or Dual-Exit Kit for a fully customized exhaust system that meets your performance and style goals for your GM 2500HD/3500HD. 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.