So I took my car down to get the Pacesetter headers installed. So I figured the were bolt on... nope. They had to do welding and the install took 4 hours. They don't sound too great and the build quality on them is half rate. There were marks and dings all over the headers from the factory. So I would give them a 2 out of 5. Definitely get the vibrant header/dp and save yourself a whole lot of time and effort. The ground clearance on these damn things is awful now also. I scrape every speed bump and my ride height is STOCK! It is pretty ghetto. So yeah, f pacesetter because their headers blow. Vibrant makes a way better product, and I am sure ZZP is way better too.