Nice review I also have a ppk with my n55... I bought the car with the ppk so I can't say how the difference feels. But I have driven my brothers n55 e92 which is pretty much same exact car as mine and I can feel the difference... Most people will see the price/gain and laugh but it is worth it if you ask me because it delivers the power in such a smooth way. Also not sure if it really puts it in the s4/5 range. But with the warranty thing... What's stopping you from getting an AP and just uninstalling before you take it in to dealer? From what I read around here I think most people get away with Ap... Also question, for updates how would I be able to see if I have the latest update? And what is the benefit of a newer update?
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