Originally Posted by CRXalwysk8
i found out that the pm8 ecu is for a hf, so im gonna use the pm6, but now i dont know which manifold to use, also ill sell the pm8 ecu to anyone.
Use the intake manifold that is larger. One may be from the hf which is garbage. It has tiny runners and throttle body. The si one has larger runners and larger throttle body which means more air. Add more air and more fuel compressed right it will make more power.