Deuce the better gas mileage is what i'm shooting for, not really that concerned about the hp right now. this is a daily driver. mainly looking at the headers because think i have a slight warp in my exhaust manifold. i change the gasket and about 500-1000 miles later its starting to leak again. figure if i change from the exhaust manifold to headers might as well change out the intake at the same time. unless any of you guys have an idea of how to stop my leak.