Question on HP racing headers

Hey I just got these headers from my cousin and he said he got them off a 97 civic, will this fit my 93 civic??? I looked at their site and to me it seems like they would fit since the headers they have on the site say 92-00. Sorry for the newb question...Im still learning;) Also what kind of HP gains does these headers give?

yah they should work. If it was from a 5th gen to a 6th gen with a 1 piece exhaust manifold and cat then I would worry about fitment.

Not much Hp. You wont notice it. 3 - 4 hp maybe..

Yea they fit no problem, thanks.