RAPS.
Hee. All it is another duct from a car with pool hose coupled to it. I guess, it connects to the airbox where the intake elbow is? I'd be leary with this if you go in any water...

Looks like someone a(link on the page) came up with putting a DC fan (Electric Supercharger) on an intake to blow air into the intake too!

Reminds me once, I was playing with a turbine engine scale model. What was interesting is that the fins/blades are angled (pitched) in a way that incoming air accellerates the next set. Too bad the auto industry never thought of making a smaller scale for its intake. Too much engineering to make those bearings small and efficient...