I was wondering does the H22 downpipe bolts to the H23 cat? Saturday afternoon the welds on my "custom" piece of pipe that connects the 5th gen downpipe to the cat decided to let go and I'm practically running open header. Since I now have a 4th gen H22 downpipe I was thinking about changing it now since I have to do some work under there anyway. So is it a simple bolt on or is there something I have to modify? I did a search but most of the stuff I found had to do with the H23 cat and a H22 catback.