yeah i got a del sol that has a jdm d15b, and i'm about to put a d16y8 head and im on it to see what it will do, i like the consept of out running a b series with a d-series, maybe not the built ones, but some of them for sure, anybody know anything on how much it will help, or anyone ahve any sohc setups, let me know, i'd love to hear about them.