PHILLIPDEEZ

i have a t28 off a nissan for my tubo set-up and it has a triangular flange welded at the the end with the 3 holes in it for bolts obvioulsly. Well i was gonna have it(the flange) cut off and just have a pipe welded there but my turbo guy said it not possible so i been look for soulutions to this i keep hearing of this j pipe but i cant find them anywhere anyone know where to get them and how much they run for?thanks, or does anyone else have a solution or even know what i am talking about as far as the triagular flange?