Blow Off question?

[RSX302]

I'm redoing my intercooler piping and wondering where the proper place is to mount my bypass valve? Before or after the intercooler. I have see it done both ways. Which is the right way or does it matter?

They will both work just fine. The purpose of the blow off valve is to protect the blower from spiking pressure when your throttle body slams closed. This pressure will be pretty close to the same at both points. One could say the shockwave starts at the throttle body so put it there. I don't think it will matter either way. Unless your intercooler collapses...