Had an H-pipe put on my truck today. I wanted an X-pipe but the guys that put my exhaust on when I got my truck didn't leave enough room for one, so I had to settle with the H-pipe. It actually made my exhaust sound more mellow, and its not as loud as before. When I save some money up I want to change the whole thing out and put bigger pipes and get some headers, but I dont thing that there is still room for an X-pipe.