It will fit however if you just order the swap it will not. You will need mounts, shift linkages, re-wiring you engine harness and ecu plugs to run 4 injectors instead of the 2 you are running right now. there is a lot of work involve and you can really set yourself up for a lot of problems if you do not know what you are doing, especially when it comes to the wiring. If you need any help or to be pointed in the right direction, PM me. I've do a lot of work on 88-91 civics.