[91civichatch2571]

I dont know too much about the b-series. but im guessing that the b16 pistons are higher compression that the b18. meaning that their better for an all motor set-up and will give you a few hp. As for your "dumb question" lower compression pistons will end up with less torque and hp without the turbo. dont go lower compression unless you definitly plan to use some sort of forced induction or else every penny you put into building the motor will be spent on making it slower.