ok im gonna end up buying one of these two midpipes and hook it up with the original 40 series flows. now, these two more or less run for like 150 so i will chose one of these based on sound and power gains. im sure both are waay better than the crappy factory h, but does the mustangtuning x produce that much more than the mac h? does the mac sound better than the x? are these two around the same in loudness? im on a tight budget, since im entering college so help me chose wisely. 
it is loud as hell and has no rasp. i get nothing but compliments about the sound and volume of my exhaust. theres a vid of my car's exhaust floating around somewhere on the boards.....just do a search for mustangtuning xpipe or something and see if u can find it. If not, PM me and i can email it to you later tonight when i am out of work. 
im not sure, but obviously i want power as well. maybe this will ultimately determine my choice.