Who can explain the whistle I'm hearing under very light acceleration? It's a kinda cool "supercharger-ish" sound, but I don't know why it's there. Anybody else have this encounter with their aftermarket intake whether K&N, TRD or something else?
the whistling noise is air traveling through your intake manifold kind of like a flute. the factory air box is designed to make the noise quieter like a muffler in your exhaust.
