Ok here´s the deal with changing pipes on the new fuel injected hogs . think of it like this, if you ride from miami to denver would you have to remap your bike? answer is no... the computer makes the air fuel mixture right .So if you are running straight pipes you wil want to add as much air as possible. you put pipes with half baffles then you´ll still want to open your air flow up more than factory does. just a thought !