2017-2019 GM 2500HD/3500HD 6.6L L5P Duramax Downpipes

If it’s time to upgrade the restrictive factory downpipe on your 2017-2019 GM 6.6L Duramax L5P, look no further than Alligator Performance. Swapping out your stock downpipe for an aftermarket option is one of the most effective ways to enhance your truck's sound and boost overall performance. These high-quality downpipes are designed to improve exhaust flow, leading to noticeable gains in both horsepower and torque, while also enhancing fuel economy along the way. With a range of styles to choose from, you can select the downpipe that perfectly matches the look and sound you want for your tough GM 2500HD/3500HD truck. For even greater gains, pair your downpipe with a High-Performance Tuner to unlock even more potential from your 6.6L Duramax. GM Duramax Fitments: 2017, 2018, 2019 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.