[G-sport]

Got one of these to fit But no down pipe, I'm not certain what type of fitting the downpipe is supposed to be but there is NO flange or bolt holes on the turbine housing.
IS this a "compression" type joint fitting using steel rings or am I way of the mark ?
I am looking to get something made but am not sure how the two parts fit together, any advice would be welcome.

Garth.