I've read the the "X w/cats" actually worsens the sound . If you want more volume, you'll have to go with an O/R X or H.

 

I would be interested in hearding a X pipe aswell. I have heard chambered mufflers sound best with a H pipe and a none chambered muffler sounds better with a X pipe. X pipe produced more of a raspier sound and a H pipe lower hallow rumble, Well not always the case but mostly

 

I went with the FRPP x-pipe and GTAs because they are on the Shelby GT/GT-H so I figure they gotta be worth a couple of ponies and will retain a "factory modified" condition for my GT. I did see a magazine dyno run of flowmaster axlebacks on a 05 GT and the car made less horspower (maybe 4hp which is withing variance so maybe it is a zero HP change really) than the stock exhaust, just an FYI, not trying to get people upset.

We'll get video of Graypny's modified 05 and my bone stocker (Except exhaust in question) this weekend and then after about 200 hours of editing I'll get it online. Hopefully that will be able to answer some questions.

 

Leo has "this" set-up. I'm anxious to hear it as well.

 

RPM Outlet has lots of bad commnets on this board. Buyer beware!

 

Yes they do...that's why I decided not to order from them. I ended up ordering them from CR @ Tillman Speed...great price and customer service.