how big is the differences between a Hatch's exhaust compared to a coupes?
i have a 3in exhuast for a coupe i just got a hatch so i wanna see if i can use it.

 

It shouldn't be THAT much different, but some modification will be needed. Im getting a hatch soon and I have a sedan so i need to get my exhaust modified too. I believe the hatch's piping is a bit shorter. Im guessing the axle back section would have to be modified. Not 100% sure, but I know for sure the sedan/coupe piping isn't the same as the hatch.