Would aftermarket exhausts designed for the Si fit an EX model Civic? I would have to imagine they would as far as fitment, but could it hamper the "performance" of the EX? Not looking for a noisy exhaust either, just something with a mellow tone to it, like the Greddy SP2 catback system...Thanks for any help!

 

i was wondering the same thing just a few days ago... though i was wondering more in terms of if it would fit. thanks to whoever answers, love this place, just registered

 

They will not fit. The Si exhaust has a cat on the exhaust pipe while ours is in the engine bay. You'll need some modification for it to fit, but you can't do these mods yourself, you'll have to bring it to a shop. But if you just want the muffler, then the mufflers for Si will fit on regular civics.

 

an axel back you can swap from SI to other models but not cat back