Im 16 ive been reading about the 4a its a good engine but to make like 200hp its alot of money and i dont have that much money..im thinking engine swap of keep the 4a to upgrade?? Best updragrades?

Why start two almost identical threads?
Plus this is the buildup section where you would post once you have a plan and actually start doing it.
viewtopic.php?f=9&t=9460