new fly by wire throttle bodies from the factory are not really rebuildable. What the factory did is to neck down the
inside diameter of the body so that it can not be enlarged.
you want a bigger throttle body for your bigger motor there are 3 way to get one. The factory actually sells a 58 mm
FBW t/body. It is a nice unit but it is limited.
choice is to send to me your throttle body and I can get it done at S&S or at HPI. What they do is take the internal elctronic
motor and parts out of your old one and install it into a new casting that has a larger body. These throttle bodies come in
58mm, 62mm, 66mm, 68mm, 70mm .
They start at $500 and go up
depending on size.
questions just ask ???