That really does work at least on mopar cleaners. I saw a you tube video of those guys on..(cant remember the name of the show) but the one guy is steve (his last name starts with a d and I cant pronounce it much less spell it) he is a big mopar guy and he too a dual snorkel mopar air cleaner and put it on a dyno with it stock and flipped and it made quite a bit more power!
