Hi, I'm new to the forum, and i was wondering what the stock exhaust size would be onmy 97 blazer, or even around the muffler would be helpful, thanks

 

2.5" in / 2.25" out if I remember right. So from the y-pipe back to the muffler, it is 2.5" and from the muffler to the outlet, it is 2.25".

 

thanks

 

I thought the cat in was 3" Ahhh well, cat to muffler is 2.5, and 2.25" out the tail pipe.

 

I got a good deal on muffler componants at rockauto.com ...probably better that trying to peice rusted stuff together with clamps and such...(if thats what your planning on doing)