I used to own a 94 Accord, I put the H22 in it and it was a big difference from the SOHC to the DOHC. but in a civic the engine is way more heavier than any B-series engine and will be an extremly snug fit. plus you would have to go with an obd I H22 which really isnt as good as the OBD II H22 power rate ratio loss, HP gain. the engine also was set in a manner that was a longer more heavier vehicle, which the civic unfortunally is not. all in all H22 great engine, putting it anything else than a prelude or Accord well let me put it this way if you only plan on going staright, great but as a daily driver and going fast in every kind of direction not a great idea.