Nice work CP, the 4.6L is the sexiest sounding car ever. Some x pipes are made in different configurations, so the sounds differ. I personally have the BBK X, with blowmaster 44's, and my car almost sounds kinda 4v'ish to an extent. Mine don't have any raspy sounds, its more of a gurgle sound. Some of the cheaper made X pipes make that raspy sounds that I do not like, so I definitely understand why some people say they don't like the raspy sounds of the X. I'm going to try to upload a video later today to give a good reference for people trying to decide which one to go with. I've watched some test on the dyno with the h and x. The both made the same power down low, but the x made 1.5 HP more at peak without loosing power at any point in the curve. This was a 350ci engine. So on our cars it will probably be around the same, maybe less.