Used Sierra catback, clean. I haven't programmed it, thrown anything with it, or revved it hard. It fits models from 2019 and above from the renowned BTM company. The outlets are stock, two hidden outlets on the bumper. Its advantage is that during the installation period, approximately a year, no one has told me anything about it. Sierra - Silverado Catback, Bumper Outlets (Stock) Model 2019 - 2025 Features and Specifications of BTM Catback for GMC and Silverado: Resonator size is 3 inches. Resonator valve thickness is 4 mm (thicker than usual valve thicknesses). The benefit is stronger resistance to backfiring and cutting. BTM Catback with the electronic device, 3 inches. Made of 304 stainless steel and fully TIG welded. Increases engine performance and horsepower. The price is by offer, and I will not be unreasonable with the price, knowing that its new price is 4100 SAR.