Ok I'm gonna have a solid compare video up next week or so to settle this same car, same cam... etc.

Right now I have a 4.8i with cats but no resonators and no mufflers with an H-Pipe straight out.

Next week (tuesday) I'm switching out the H-Pipe for an X-Pipe only.

We will see the difference this one single variable makes shortly.

until then this is my current cat's to h-pipe only no res no mufflers videos.

Rev with cats and h-pipe only:
https://www.youtube.com/watch?v=-f6uvN181yA

https://www.youtube.com/watch?v=lGL7oLHbp6w


Highway cruise w/ cats and h-pipe only:
https://www.youtube.com/watch?v=CtR7fVZwyvc