Most Power Out Of N/a Sc300 W/o Turbo?

[JSC300]

i just ordered dual 3" thermal mufflers and piping with cams and valves...i was going to order headers but what would the point of that be if im going to turbo it soon...i was just thinking about how much hp i could get with out turboing it?

[AWJ]

Maybe 30 horsepower. I say, what's the point?