I've read where changing the breather and adding slip ons to the 07 bikes messes up the performance, is this true? The bike does run great just being totally stock but it sounds like s@*t! I've had 5 bikes in the last ten years and have opened each one of them up which gave them better performance and much better sound. Hopefully this can be done on the new bikes. Any input will be appreciated.
Exhust for 07 Street Glide 
Linear Mode
