So as some of you may know I was in the game to purchase a new exhaust system (thanks for all the input btw helped alot!) I ended up going Bad-Mab header, 3" Hahn catted DP, and 3" ZZP resonated catback. (I know 3" is a bit overkill but I plan on going TVS soon) I got it all in the mail, had a chance to go into work and put it on, I get there and the Hahn DP flange holes dont match up to the ZZP resonator flange holes. OF COURSE! So I am going to try drilling them a bit bigger and see if that works..gotta love it!

 

Why didn't you go with ZZPs DP?