SCT is where I'm getting my info from. In the data provided in their training manual, they talk about how it's not a good idea to use OEM draw through type MAF as a blow through because it reduces the resolution 20-30%.
After looking at the trial and error many of the Focus owners have been going through, they all switch over to a draw through setup. This is on the support forum for SCT PRP currant users and simply things I've come across in my research.
