I was wondering if someone could help me figure out the stock exhaust pipe size. I think its 2.5in but im not sure. Im trying to piece together exhaust without buying a full catback.
Yes you are right, its 2.5. - abis_garage 5 years ago
According to AMs website its 2.25: https://www.americanmuscle.com/understanding-mustang-exhaust-systems.html#:~:text=2015%2D2018%20(S550)%3A%202.25%22
I'd highly recommend just doing the whole catback though. Ton of weight savings getting rid of the suitcase, and no need to piece parts together. It is much easier overall. - 17SCMach1 5 years ago