I didn't do this install myself either becuase I don't know how to weld yet. It requires some minor welding to attach the Cat or whatever it is to the collector tube. I had the dealer do the install, but I don't recommend this unless you know the tech is good. Luckily, the headers are the only thing the dealer did that they didn't screw up. I paid $200 to get them installed. Go to a good muffler/exhaust shop and get it done. Also, call URD for installation advice as there are correct and incorrect ways to install these. Good luck and enjoy!