yeah i understand all that and he is using an SOHC, that is why i said the .48ar would be nice, and vapor stated above about the stage 3 wheel already and i figures that was put into the plans for the turbo, That is the reason i suggested the .48ar. the power differences between a .48 and .63 are nothing worth sacrificing the spool time on the sohc in my opinion. That is why i would go with the .48ar... All in all it is completely preference for him,