I have done quite a few myself, but never paired removal with a high flow A/C and a tune. Biggest reason for removal was heat, negligible difference in sound.Decating to get more sound is a waste of time. Pulled to many CAT to go for that. Maybe a very slight change in tone but so hard to notice. Same with the flow of exhaust unless you have an bit of a build in the engine cam ect the CAT flows pretty free. Most of any effect of taking CAT out pretty much is just fooling your self. What to make the bike sound good put a good cam in it. That changes everything.