Exhaust piping diameter

The mazdaspeed accessory exhaust is 2.25" inner diameter. I'm thinking the stock is more like 1.75" - 2". The answer is already out there on the interwebs though. If I have time later I'll dig it up and update my post.


EDIT** a search on m3f says 1 7/8".
 
Last edited:
yeah ive been having a hard time googling it and getting a accurate answer. so 1 7/8 or 2 inches???
 
Back