Those double inlets are NACA ducts, that when designed correctly, add minimal resistance to the air flow. My son-in-law who designs and builds UAV's (drones) for the military tried to describe how to design them in layman terms. Wasn't layman enough for me but there was something about opposing vortices cancelin each other out...blah, blah, blah. His plane's radiators are all cooled by NACA ducts so that he can use an aerodynamic nose piece to greatly reduce drag which gives his drones more time to "hunt".
Tom