How much would the tone in my exhaust change if I were to upgrade to the 2.5 inch cat-back pipeing instead of my current 2.25 inch pipeing? I currently have the Flowmaster original 40 series mufflers. I am wondering this because I am probably going to get the Super 40's and I was trying to decide if I should get just the mufflers to weld in or to get the whole cat-back. I would save a few hundred dead presidents one way, but I would rather have the best possible exhaust tone I could get. The only mod I have are cat-back exhaust and a K&N filtercharger. I am probably going to get a high-flow catted H-pipe soon too. Tell me how you think my exhaust would sound with each possible combo. Thanks for your time.