I'm thinking about welding a cat bypass for autoX, etc. and was wondering what the stock piping size is. I tried searching but found nothing. Of course I can take it apart and measure it but it'll save me some time if one of you guys know it so I can order the parts without taking off the cat. Thanks.

 

2.5"

 

thanks alot!

 

when i took off mine the "ID" was 2.35 ish