increase in horsepower on civic sedan?
 

How can I increase the horsepower of a 2008 civic without having to increase the noise. Thinking of 160 or more. Is it possible to do this?

super chip.....?... or a tornado thingy search it up!

Wait until the warrenty is up, otherwise you may end up voiding it.

Without noise the only option is a turbo.... and U may only hear the whistle coming out from the turbo, beside you are going to have to change a few parts from ur original engine, but it's going to be less noise comparing it to using a new exhaust system. But forget it about.....u may lose ur factory warranty. Next time get a Civic SI.....which come with almost 200 horsies....In my opinion I would keep the car as original as I can.