Thread: Exhaust Compatability

Hey Guys. A buddy of mine has his stock cat back exhaust from his grand prix and i was wondering if it is the same size as my car? He put 1-2k miles on his car before swapping it out for aftermarket. His car is a 4 door 2002 Pontiac Grand Prix GTP. My car is a 4 door 2003 Pontiac Grand Prix GT. Thanks for your expert advice.

should be the same