By just getting a slip-on, you wont notice any power gains. By getting a full exhaust, power commander and a good custom map, you'll definatly notice the difference. Talk about wake the bike up!
__________________
Do you really have to start a thread every time you go on a ride and see a guy with no helmet on?
Does it affect you that much that some random guy 1500 miles away went and paid his own money for a 1000?
Do we really have to fight over who uses the back brake or not?
Do you have to argue over stupid pointless shit on the Internet?