I am considering the silicon Y-pipe for my WRX but I have a concern. Prodrive claims that it reduces turbulent flow but from my knowledge by doing this, the intercooler will be less effective. How true is this?

just get the samco hsoes

Yeah, what he said. ^

the TB to IC hose does nothing from what i understand. and i know that the re circ does even less

so get the prodrive you cant go wrong with either but eh you dont need the other two

its smoother than the stock plastic crap you have on there now

Stock plastic crap. Exactly.