Exhaust from a 2 door into a 4 door

How longer is an exhaust from a 4 door integra than a 2 door integra?
What would I have to do to make an exhaust for a 2 dr fit a 4 dr?

Why would you want to do that? Just get the right or have a muffler shop custome fit it.

Greddy, Skunk 2, Apexi makes exhuasts for the 4dr vtec. you'd have to make some changes to make it fit on a LS/GS

i've read a rumor that the 92-96 2dr civic non-vtec axel back exhuast can bolt on into the 94-97 integra non-vtec. It would be useful for the RS-R exhuast which doesn't make for the 4dr integra. But I read that in another forum, so it could work or won't.