While an exhaust tip isn't going to add any power or torque to your tough diesel truck, replacing the factory tip with something better is a great way to improve the overall style and appeal of your 2017-2019 GM 6.6L Duramax L5P build. Here at Alligator performance, we carry a large selection of universal exhaust tips in a variety of sizes, styles, and finishes so you can acheive the look you've always desired. We carry tips designed for single-exit and dual-exit exhausts systems so you can outfit your GM 2500HD/3500HD with a premium upgrade that will be sure to set your truck apart from the rest of the pack. 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.