I was given a set of swaybars that are for a 1990 integra and was wondering if it is possible to put them into my 1990 crx si.

 

it is possible may need some slight modification

 

yeah but the thing is those sway bars are made for the integra. not for the civic. so they are made to handle the extra weight and lean of the teg. now see the probelm is you might have too much over steer or maybe to much understeer.
When I put in my buddys teg illuminas in the back of my car they shot the rear end up on every bump so they where too strong and the ride was bumpy as hell and shitty.
so i dunno. It doesn't hurt to try since they are free so fu(k it.

 

the rear sway is a good up grade, search about it