The charge pipe is the piece of plastic tubing attached to the throttle body, youll see the diverter valves attached to it. Do some searching around for your various options, but i dont think you can get a synapse mount on the oe unit. If you plan on running over 16psi or so an aftermarket chargepipe is a wise investment.
E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP
F30 N55 XDrive EBII