Peace be upon you I have a 3.0 inch stainless steel Y-pipe And a 3.0 inch muffler In the X-pipe style, one side goes to the stock muffler or aftermarket muffler And the other side is the muffler Custom made so I can install the stock muffler or the aftermarket muffler Fits LT engines Fits Sierra and Silverado from 2014 to 2018 And Tahoe from 2014 to 2020 Important note: if you close the muffler, there is no sound at all The sound becomes stock Contact: (( Phone number appears when clicking the contact button ) )