It wont change much. One time when I was monkeying around with my intake, me and 2KWK4U took everything off all the way up to that monstrously big boxy part of the intake. We started it up and rev'd it pretty good and it was still pretty silent. It may have sounded better if we drove it, but I wouldn't drive around without an air filter. Hopefully soon, someone will be making GR8WHT's intake again, just get one of those, they are worth the money!