The BWoody one is loud. Almost sounds like blow off valve when you let off the gas in fact. Now I know everyone says that all the intakes are the same, but I deffinately notice a difference. I can also hear it sucking in air a lot better then the stock intake. Take it for what it's worth, thats just my .02 cents. I can't comment on the other intake set ups as I have the BWoody and don't have the money to test them all lol
