Bill Mussatti posted above that the new boxsters have more stages.
However, the older ones have two to my knowledge. The first is just redlining the car without it shutting down half the cylinders to keep the engine from blowing.
The second is where it shuts down half the engine to keep you from blowing it up.
To my knowledge, Porsche has no warranty or statements saying that the car may be delivered with one or more redlines on the motor.
However, if I ever buy another Porsche, the car will be put on a PST Tool and I will not buy the car if I see the motor has been redlined repeatedly.
Finding a brand new boxster with a couple of hundred miles on it that has been demo'd hard and has dozens or over a hundred redlines registered on the computer, which can never be removed by the way, tells me that car has been abusively driven in the very first miles of the motor's life and I should walk away.
This may just be me being very cautious and overly zealous. I just know that Pcar motors ain't cheap and I'm not paying for someone else's foolish driving habits.