ok i have a question i have a 07 honda civic si and it has a cold air in take...
 

...headers and a catback system but i still want it faster any tips..... help me out

You could do these things...















1. Put a high flow catalytic converter on it.















2. Install underdrive pulleys















3. Install Iridium spark plugs















4. Get a performance computer chip































Check out:















http://www.procivic.com































http://www.sportcompactonly.com/tech-articles.htm































And of course the real deal to make it faster:















Install Turbo/Supercharger/Nos system































Good luck.