By the way, what kind of car do you have? If this is a Turboed MP5 you won't have the hole in the stock intake pipeing. This is found only in MSPs. You'll need to either connect the valve to your intake track somewhere after the MAF sensor (recirculating) or relocate the MAF sensor to a postion after your BOV so it doesn't measure any air that gets released out of the system by the BOV. Both set ups have been done. Do some searches on BOV or stalling in the forced induction section.