What flange is this
 

Does anybody know what flange this is

Looks like a greddy turbo kit mistu TD04-15g 4 bolt flange.

That's the turbo yes. But I bought a shitty obx replacement down pipe I know it's shit don't hate on me I bought it because I don't have 400 to 500 dollars to blow on a begi one and the flange on the obx one is 4 bolt but it's a to oblong I know some where out in the world someone sells the right flange. I was gonna but a new flag and have my buddy tig weld it to the obx down pipe.

Yeah the Greddy turbo td04 4 bolt flange is different than the regular DSM flange hence why it won't fit. You won't find the flange sold anywhere as the flange is unique to the greddy turbo kit. I'd try talking to Begi and see if maybe they would be willing to help you as they still make downpipes for the miata.

Alright I'll try and do that then see if maybe they will just sell me a flange

Get a turbo that works with the commonly available manifolds and down pipes.

I just went through the same thing. Open a dispute, send it back. Item not as described. They list it as a direct replacement for the miata greddy downpipe, which it's not.