The first post is a gullable person that gets his knowledge from magazines and not test and trial. 25 hp from a intake, header, cat-back exaust is outrageous. You will be lucky like the previous post said to get 10hp from all 3 mods. I have driven civics with superchargers and they are not fast at all, so forced induction would be a waste of money unless you build your motor to handle a very high amount of boost. Fast fix would be nitrous (recommend 75 shots max on stock civic motor). Its not a full time mod but you get every bang out of your buck.