i havent done it yet.... but been thinking about doing it. Does anyone know around how many extra ponies you can get out of it? noticeable gains in speed or take off?? will it hurt in the long run.how much people charge to do it....and would i have to change to premium gas? i have tried searching for threads but cant find them.... so if you tell me to search for other threads i will hit you in the throat!!!..lol sooo in the half shell i want to know everything!! Thanks you guys ROCK if you answer my question..lol!!