I just bought a 2008 R6 about a month ago and was wondering what some of the best slip on exausts were. Im sorta new to the sport bikes and dont know what to get. I have a 4 year extended factory warranty with the bike and dont wanna void it. I know that the cat will quiet the bike but im guessing removing the cat would void the warranty and a tune would be needed and that would probably also viod the warranty. I want a deep tone and want it to sound loud but not to annoying. Any ideas?