Exhaust Header Mitsubishi Mighty Max Dodge D50 MonteroNEW Header for a Mitsubishi Dodge Pickup. If you are looking for a true "seat of the pants" power upgrade, then this header is for you. Headers allow your engine to breathe better, letting more exhaust out. Horsepower may be increased up to 20%. This header is application specific (not generic) with smooth mandrel bends, and even heat tested. Header comes with manifold gasket. We run this header on our vehicles, and with the combination of it, a Weber