What's the stock pipe size before that cat on my car? Thanks.

 

I cant tell what size and kind of motor u have but I'm assuming cause u posted in TPI that that it what u have. IF this is true it is a 2.5in. Diameter pipe before the cat.

I think u would have better luck posting in the exhaust section of the boards next time

 

For some reason my siggy didnt post. Here it is.