GMC Sierra SLE Peace, mercy, and blessings of God be upon you. I have a catback used for only two months. The Y-pipe and the dual tips are new and have not been used. It fits Sierra from 2014 to 2018. It comes with one tip and two tips, the device, and two remotes. There are no issues, no welding, nothing, and it installs without modification. The full new price was 4750, and the invoices are available. Currently, the Y-pipe has been out of stock on the website for a while. Selling to the highest bidder.