Yea I know the stock one is a diverter valve, I wrote it wrong on my sentence. But i've seen threads where they used both set ups, which is what I was talking about. But about the hesitation. When it "hesitates" the rpms never drop. It just struggles to climb up as fast as it was in the beginning. I have the hardpipes already with stock intercooler along with a CAI and exhaust. My next mod looks like its going to have to be the SSAFC. Believe me I would love to cure this hesitation, especially after experiencing for the first time how smooth and fast it felt that one time. I want to be able to do that fulltime! Sucks cause i'm running out of ideas/thoughts. But I guess SSAFC it is...