Hi guys, I bought a 1990 Coupe Quattro with a 10vt engine swapped in already. I don't know much about these cars, or the 10vt engine. Which family of turbos will bolt up to the stock manifold? (I guess I'm asking which flange do the stock manifolds come with?)

Thanks!

Mark.
75 Scirocco
80 Scirocco S
81 Rabbit Pickup
90 Audi Coupe Quattro - 10vt