Ive got a 4 bolt t25, and im wondering what other DSM flanges this resembles? 15g, 18g, etc? I dont know sheit about DSM turbos, so excuse the lame question..

 

The DSM T25 flange is the same as the 14b, and a few other (Mitsubishi) based turbos. The 16g's and all the other fancy ones are aftermarket turbos, basically modified 14b's with different wheels and such.

But dont be confused, because the Td05 15g (all Greddy turbos) have square bore inlet flanges and are NOT the same, and the JDM T25 flange is NOT the same either.