When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
It does matter if you have a blow off valve. If you recirculate pressure, you don't really need to move the MAF. If you have a BOV, you need to move the MAF to be after it in the order of air-flow.