the TPIS Cold Air Intake system. I have it installed now with a piece of PCV similar to what you did. I used some blue RTV to seal it and have it connected to my air duct & throttle body. It works fine but I do not like how it looks.
I want to ditch the PCV piece and use a MAF sensor like the TPIS instructions say. But I will remove everything from the inside making it hollow for high flow.