RE: Straight Piping Legallity Throughout the US
Ok why would you really want to??ALL engines diesel or gas need a bit of back pressure in the exhaust to run right..straight pipes just wont build enough back pressure not to mention how bad they sound diesel included...I mean to much flow is as bad as not enough...if you look inside the headers they run on drag cars youll see a cone on the inside thats designed to maintain a small amount of back pressure..its like running a tuned pipe on a nitro engine the right length and diameter and it helps the engine rev higher and put out more power...just wonderin