You try drawing something smooth and flowing in Powerpoint then! I'm not a Dick, stop making it seem like everyone is a Dick. I know lots about this shizwhack, ok your right, whack on a big exhaust and an induction kit/new filter and your car will run lean and shit, especially if you don't change the carb (if you have one) needle to suit. Most people don't know that though. Rolling road tune it afterwards though, and you'll be away. Also, there is no evidence to say that back pressure is needed, as it's not.