The one I bought seems to be genuine?, its from this guy and this type ,maybe these are knock offs??,is there anyway to know for sure?....
Subaru Impreza MAF Genuine Denso Forester Liberty Outback wrx sti | Engine, Engine Parts & Transmission | Gumtree Australia Belmont Area - Belmont

http://www.ebay.com.au/itm/GENUINE-I...item43b4f99525 his Ebay feedback is Excellent


The reason I asked if other tuners can alter the tune is that MMS want $350 for the first hour!