this thread makes me never want to come back to the civic forum. Please for the love of god...if you dont even know that civic doesnt have "headerZ" dont post any sort of advice on engine performance, instead A: read up and learn B: kill yourself now and save the world some trouble.

you bought a civic lx..so either swap the motor or enjoy good gas milage...dont throw 500 bucks down the tube just to get 10hp if that....you want a fun car, put a real nice set of rims/tires and suspension on it. Twisties > straight lines.