Pretty solid, I will be doing a swap here when i get time. I do have couple questions for ya. Where did you get the bolts and studs for your kit? I got more, but dont want to clutter your thread.
It's because the stock wastegate isn't made to control 9.5psi of boost and can't react as quickly as a larger external gate. If you get a decent EBC you can control the spike better. Nice dyno, BTW.