im about to get my exhaust installed next week and planning to get a header (maybe cat. converter as well afterwards). i intend to install the stuff myself (wish me gl) n im a bit worried there is a chance that my header and catback won't line up correctly and have a small gap in between. is there any way to make sure this won't happen or fix it if it does happen? thx.

 

Why are you worried? If it is meant for your car it will all line up. More details.

 

don't get cheap crap. i.e. eBay junk. My friend did that on his old 95 Civic and we had a hell of a time getting the exhaust together.