Hey guys - thinking about going with a custom exhaust setup and have a few questions.

I'm thinking about buying some flanges/hangers and having the shop make me a "bolt on" custom setup. I'm going to have them bolt it to the stock y-pipe.

What size flange would I need?

 

Any custome exhaust should really include a new Y pipe also. It's probably one of the more restrictive items in the exhaust system. Or by an HR oem Y and go from there.