What exactly do you want to change? I put on the Bullitt mufflers on my car the other day, there is no need for the extra expense for the "tuned" H-pipe.
Yeah I kinda figured the h-pipe was similar. All I was really concerned with was why they say the 2008 mufflers are only for 5speed cars. I have a 08 GT automatic.
Not true FRPP mufflers can be used on manual and automatic cars. I've done it plenty of times. As for the X-pipe I wouldn't bother unless you get a set of long tube headers.