So, my exhaust has a leak and cannot take a sticker. The mechanic that looked at it said get an 18" muffler and he'll weld it together and get a sticker for it. Having called around a few places I found out that there are mufflers on the 1999 Saab 9 3. Great. So, I talked to my ex (who is also a mechanic) and he said that if he were doing the work he would just run straight pipe from the cat and put a muffler on the end (as I am a 30 year old soccer mom of 3 - no aftermarket exhaust for me! LOL). Now, when I went to buy the muffler and exhaust clamps they wanted to know the exhaust pipe size. I DON'T KNOW! I can't get the car to the mechanic to have him size it but I ask you guys - on a factory 1999 Saab 9 3, what is the general exhaust pipe size? I have seen people say 2.5", 60mm, 2.35", 2.25"....ARG!