- May 29, 2002
I found this Mustang Monthly article on Functional Ram Air installation. My issue with the article is it claims the flap position is open when there’s no intake vacuum. Wouldn’t this mean that the flap is open all the time? Seems to me that the flap should be closed when there’s no vacuum present. Can someone with an OEM Ram Air setup please confirm proper flap position when no vacuum is present?