I'm ordering LT headers tomorrow(BBK). I'm going to do the installation myself. A bolt on X pipe is $200, the same as a Dr. Gas x pipe which is better, but requires welding. So I'm going with the Dr. Gas. So, my question is how did you guys that did your own header installation with the Dr. Gas x pipe go about it? Because after the headers are installed I won't be able to drive the car to a welder to have the x pipe welded because of the rear O2 sensors, right? Also, can my UPR x pipe be customized to fit the LT BBK's without much hassle? If so I may go that route for now.