Yes its loud! Im about to take mine off if my modifications don't quiet it down some. My maf was way off from center but it didn't make contact on the side. I've tried lining the metal shroud with dynomat type stuff and it made it quieter but not at the resonance level still around 3500 to 4200 it resonates so bad ,trim in the cabin rattles..... Im talking about rattles that only happen at volume level15+ with a 12 inch sub pushed with 420 watts rms lol.
Im making a lid for mine and try to seal it up a little. Then maybe install the factory airbox resonates tube in the kn bottom plate.
2012 Focus SE hatchback sport, 203a, MTX-75, Candy Blue, Custom 2.5 Exhaust, K&N Typhoon.
Sonic Crew #012 E-123 Omega