Was this all with the same catback? Very weird that you would say that but a certain catback may have just seem louder with an h than x-pipe. Every LOUD stang i've heard usually has an x-pipe and those things scream alot more at high rpm's than the deep rumbling h-pipe. Have experience with both as wellGT12207 said:I experienced both pipes first hand,though. My MRT catted H pipe was louder than my past Magnaflow catted x-pipe as well as my current Bassani catted x-pipe.
If someone owns or have owned both an x and a h pipe, jump in here.