i like how you use my car as an example
but i think the si bumper your talking about is the one with the cutouts for fogs right? those are the 99-00 civic si's. youd have to get a whole new front end for that. i dont think there even is a 96-98 si. the only fogs you could do with the 96-98 is the square ones (yellow or clear) and the round ones that go in the same place. i think they only come in yellow