Noise from a cobalt ls

    I own a 2005 Cobalt LS Sedan. When i take off and it hits about 5,000rpm id say it makes a noise that sounds like a supercharger but isnt, woudl anyone know what the hell causes that noise? Also what kinda air filter goes into my car cause that thing looks messed up and is it possibly to hook up a cold air to it?

Its just winding out. All engines will do that when they redline.