Originally posted by BTLFED
You can, but the top part above the bumper won't match i.e the hood would be wider on the top than bottom and the headlight cutouts on the bumper would be longer than the headlights.
Headlight cutouts on bumper? Civics have bumper and then a filler panel on the top. You should be able to put on an Si-R bumper and the filler panel will still be the same so everything should fit fine. However CRXs don't have these filler panels so the bumper would look stupid. So as long as its a Civic it should be ok.