How does the catalytic converter connect to the rear exhaust piping?

[mike87]

forgive my amateur drawing:



exhaust flange:


currently, there are exhaust flanges on areas 1, 2, and 3. area 4 did not have an exhaust flange when i took the exhaust system off. does anyone know how to connect it all back together? i wanted to purchase a 4th exhaust flange assuming it goes onto area 4 in my picture above, but it probably won't fit over the exhaust piping's cutoff.

so far on my "to-buy" list (bavauto), i have the following for this section of exhaust:
4 Exhaust Catback Bolts - 07119912524
4 Exhaust Catback Nuts - 11621711954
1 Exhaust Seal Ring - 18111723541
1 Exhaust Crush Ring - 18111245960

help please

[Alecs MacDonald]

You will deffinitely need a fourth exhaust flange. The only thing i notice that you do not have pictured are the metal ring gaskets. These are required for a good seal, make sure not to forget them. An exhasut shop will be able to fit the flange for you.

[mike87]

You will deffinitely need a fourth exhaust flange. The only thing i notice that you do not have pictured are the metal ring gaskets. These are required for a good seal, make sure not to forget them. An exhasut shop will be able to fit the flange for you.

thank you for your help.