Snow Performance offers a non-progressive injection system. It is our most basic, entry level system and is recommended for low boost or WOT applications.
We also offer injection systems that read Mass Air Flow ouput. MAF referencing is typically the most accurate way to manage injection for applications that build boost quickly. This is usually the case with small, quick spooling turbos or positive displacement superchargers. A majority of the Subaru vehicles will use a MAF referenced system so I suggest making this a part of your guide.
Nate