how do i tell if it is a SBR2g20g turbo that i got on ebay?

[BoostN99]

So i got my brand new $760 Slowboy Racing 2g 20g turbo in the mail today off ebay. but i was woundering if there was certian numbers or anything i could look for to see if it really is what i was expecting or some knock off or even a smaller 18g or 16g. if anyone cou ld help me out it would be greatly appreciated.

 

[my98GST]

So with the Airesearch Comp. Housing the compressor housing is goign to leak? What if I were to get an actual 20g comp. housing? Would it then seal or still leak?