that looks like a cheap turbo upgrade for a wrx like some kind of generic 20g knock off. what you need to do to make it work correctly is to change the rear housing to a td05 or td06 (depending on the wheel that is in that turbo) super 20g because that is a t3 exhaust flange with a mitsubishi compressor housing. btw 20g's don't really last all that long. if you don't know what flange you need to build your turbo kit maybe you need to sit down and do more research about what you are about to get yourself into before you end up with a blown motor. if it were me, i'd sell it, thats too much hassle for that turbo.