my bro got the magnaflow x, (with frpp ceramic headers and ameri. thunder flowmaster catback)
and the stock h vs the mag x was night and difference. It changed the entire pitch of the car. It's got this seriously wicked growl to it. It is still distinctly american and deep, but it's got a wicked hi tech sound to it to (hard to explain) I'd buy one in a second if I had the cash.