Originally Posted by Ambiguous
i see....would i have to get 3.5 if i am gonna turbo my engine eventually? or is 2.5 sufficient enough to support turbo?
No no no...you definitely dont want 3.5" piping, regardless if you're going turbo or not. That would actually hurt your performance instead of helping it. 2.5" is plenty, and is the most common size to go with. You would really be fine w/ anything from 2.25 - 2.75" piping, but its really your choice. Leaving 3" for high boost/high hp applications
EDIT: As long as your piping is Mandrel bent, you will be golden.