Well, when I got my Apexi N1 exhaust, I let my friend install it for me, and he didn't wait for the car to cool down before he began and broke one of the threads off of the cat where the B pipe connects. My question for you guys is, should I just get a new stock one or an aftermarket one that is a little bigger? Any part numbers and place to purchase them would be very greatful. Thanks guys, I know the whole "cat" post has been beaten to death, but I really do need some advice. Take care.

 

All you have to do is grind it off, go to the store and match the skrew and bolt, then your all set. ALmost everyone rounds the head of a bolt off at one point. Ryan

 

You could drill it out then replace it with a regular bolt.