i just watched it on youtube... he describes the function properly and from the way i saw and heard the "pop-off valve, or blow-off valve, or anti-surge valve" as he says connects to the air box between the procharger itself and the intercooler, so he says that hes putting in the proper place....linky....
http://www.youtube.com/watch?v...ex=37
i think the reason it looked like that is for closed and part throttle operation the motor wouldnt suck in any unfiltered air and to place the BOV in a location with a little more room