I installed the Typhoon Intake from K&N. Looks and sounds nice, just had some adjustments to make so it wouldn't rattle when taking off from a stop... sounds nice and it really makes a difference in sound above 2500rpm. However, at any speed, anything at 1/4 throttle or less you can hear a whistling noise coming from the engine. I think its the air rushing passed the partially opened plate. This normal? Couldn't hear it before the intake was put in so I'm guessing the old filter box muffled it. Any ideas on how to lessen the noise?