Gentlemen,
(.02 ahead)
Having been through many sets of Z23s and Z26s and also swapping back and forth with the OE pads...
The Powerstops require HEAVY bedding, not only heavier than what the box asks for, but also at least twice.
It goes without saying, take great care when doing this, allowing for the possibility of significant brake AND fluid fade during the bedding process. Again, take great care of others and yourself if you do this. No other cars or obstacles in your way as well as more safety margin than you need.
You will have MUCH better performance from them.