I was wondering what the exact size of the exhaust pipe that meets the muffler, I beleive its 1 7/8 but not sure.

 

I thought that it was 2'' for my 4th gen, but the best way to figure out is climb under there and measure the bad boy. Also, do a google search, with a bit of sifting, you can almost always find good info. For anyone to actually be able to answer your question, the year of the car might be helpful. I believe that there are differences between pipe sizing between a couple of the generations, but I could be wrong. GL

 

You now whats weird? I measured it right after teh cat and it was close to 2 inches, but further down the pipe about a foot in front of the muffler (where the old pipe broke and the muffler fell off), it was just about 1.5 inches. Maybe in changes a bitin certain places.

 

The changes are probably because of the bends in the piping depending on how they were bent. The piping is going to be smaller in the bends (usually). But hey, if thats not the case, thats a bit funky.