hello recently acquired a f12x and wanting to do perfomance mods to it. wondering if the f15x intake manifold will bolt up to a f12 head. Im wanting to ditch the individual throttle bodies and go with a common plenum manifold with a single throttle body. Or... does anyone know what size throttle body the f15 has? not new to watercraft just new to modding a honda watercraft. giving it a shot.