Originally Posted by bluetwo
Actually a cheap ass header can get you more gains than an expensive one with the right metal work. Providing of course that it is of a good design. It's not all about flow, but having a smooth center is pretty important.
header is all about increasing the flow! that is why a header versus your exhaust mainfold has larger ports, and made usually out of stainless, and is routed in way to have more flow out of the cyclinders