any power gains from header only?

the flow of the air into and out of the engine is VERY restricted....opening that flow up any way possible is always going to make power....but real power will not be realized until you uncork the entire breathing system....intake, headers and exhaust to start but eventually a TB, port matched intake manifold and a good port and polish sould really open an engine up. Just getting the headers is a good start but it wont get you a lot of power because there are still going to be bottle necks in the system as a whole! But hey everyone has to start somewhere wether its an intake by itself, headers by themselves or an exhaust by itself....there arent many people who w8 long enough to save all the money and buy everything at once...its a process....and thats why we love it