I just bought a 03 750 throttle body with all injectors,plugs and all other goods. I have heard that it would fit on a 03 600 with no problem it would just need a power comander and custom mapping. no problem I have a power commander 3, and a dyno shop in town to take care of that. I just want to know if it will actually fit correctly & safely I know that the 03 600 throttle body size is 38mm and the 03 750 is 46mm so hopefully I will get the performance upgrade I am looking for. if anyone could let me know if it is a compatible switch I would greatly appreciate it thanks.