Quote:
Originally Posted by 1slow370
It's actually called an air horn, venturi's are what are used in carburetors and cause a pressure differential. air horns try to smooth the flow of air entering the pipe from the sides to reduce turbulence and increase flow. All the crappy JWT popcharger kits have one. You see them on ITB setups as well.
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Some companies are using venturi style intakes to help increase the velocity of the air as it comes in. Stillen has even used this design before. I dont know if its just another name for the air horn or a different design but they are using it in CAIs. Again just a way to try and increase the velocity of the air.