man i just took out the second set of baffles for that 2 out 2 in sound. and it sounds bad ******. i think something was clogged in my left carb because it wasn't running that great before after taking out the first set of baffles. but all of a sudden when i left it idleing, i heard a pop and then what i guess was the carb clearing out and walla it runs just fine now. i deffinetly notice some preformance increase and the sound is awsome compared to stock. and i haven't spent any money doin any of this to my bike.