My wife and I were at Wal-Mart and while walking back to my car across from it was a 10 or 11 5.0. The guy turned on the car and pulled up next to me. It was an automatic and couldn't help but notice the monstrous tone coming from the exhaust.he said it was the borla atak catback exhaust.my wife was sold and so was I. Since doing the muffler delete I was stuck on the gt500 axle back but after hearing these I think I'm going to go this route. My question is will there be a noticeable difference in sound with the catback than with just the axle back. Both are pretty pricey. Will the catback net me some hp? I know the axle back is more for sound. I plan on doing a cai(steeda) down the road along with a tune. I also had in mind doing an o/r x,resonator delete, and axle back. Will this be comparable to getting the catback or will I get the same performance/sound results if I go this route?