I have the F23a4 , since it is ULEV. Is there anything I Should know before I start buying performance parts for this? I know the exhaust and the intake manifold is different from the F23a1 . and also the Ecu has an oxygen control sensor am I able to by pass that so I can proceed to establish more air flow? P.s I am very new at working on cars, I only know what I have studied. Never have I done any work on a car. So please keep that in mind when responding.