what i would try first is taking off the filter for the intake. see if that does it, then if that does it is just the noise of the air going thru the filter. you can't put your head under there and hear where it is coming from? if that doesn' work taking the filter off, take the whole intake off, turn the car off and do a boost leak test. then if it's a boost leak you will be able to hear it w/o having to listen over the exhaust and engine running.
oh yeah, clean up those damn wires, pick up some wireloom, it's pretty cheap and looks 10x's better.