After a full tank of gas and WOT like its going out if fashion I realized what my problem was during my first drive after PPK install. My wife was in the car
With some alone time, I quickly realized that the car is definitely more responsive at all RPM ranges. Throttle response is different and for the better. One thing I notice during a quick blip on the trottle at low RPM is that it builds rev quickly then it shifts up even faster creating an uncomfortable jerk. But other that that added power relentless pulls. At times I felt scared during WOT as the suspension bounced and tires slipped on the shitty roads of Chicago.
I am still amazed at how much change in sound it brought to the stock exhaust.