Hey all! I have a 99' civic si with intake/header/test pipe/exhaust. I have also done better wires/plugs, pulleys, and a venom 400 (yes it does help alot). My question is would getting a apexi vafc piggyback unit be worth the money for the performance obtained? Also, on a completely different note, what kind of fly wheel hp numbers can i expect with what I have already done? thanks for the imput!!