im going to quote myself:

there is a point where an open cone will trump any other intake. is it when you're lightly modded? no. is it when youre modded moderately? no. it's when you have run out of other areas to expand and the intake is the final choice of making power or not. when the motor demands more air, are you going to give it more air or use an intake and slightly restrict it? see what im getting at here?