Hey guys, quick question here.
Stock cat is starting to rattle and make some annoying noises. Secondary o2 sensor went bad so I'm just going to swap it out for a test pipe and new o2.
I've noticed there are a lot of different sizes (63mm, 70mm, 71mm, etc.)
What size is the stock exhaust (2001) so I know what size test pipe I need for a correct fit.
Thanks.

 

Nobody knows what size test pipe to use with stock exhaust?

 

63mm will fit the best.

 

Thanks, all i needed to know