Don't do it, not worth the embarrassment of getting whooped again. Just fork out the money now and save the money wasted on doing your own. All the what if's are done for you. www.needswings.com cold air intake. Start with that and a custom tune, until LET can tune a car faster than MDsrt6 then InMotion is the only tune. With a custom tune of $500 you can send back for free as you add mods such as a 178 pulley, and mani's when you are serious about putting your buddies car to shame. Look at my sig, it's can't get any easier than that.