hey all....just installed a DV with the same intentions just as anoyone else would who wants one. Its an evolution....i now know that you're not supposed to hear a difference in sound with a DV, however, my buddy with a vdub told me by installing an intake, it will make a sound (both the intake and DV)....however, he said only an "open element intake" will make that happen....can someone explain the difference in open and closed element intakes for me? and whats the best intake to put in the 1.8T's on a 2001 A4?