I would also say C2RS's car has a bit of an issue there (Pirelli isn't it)....the K04 naturally makes its peak power at 6200rpm or above when remapped. Fact yours hit it at 5700 and stopped suggests something is not quite right (not enough air, boost leak, fuelling issues). S2 with no proper intake doesn't help matters tho.
might be good to find out what boost it's asking for at top of rev range.
of course JKM could have done a mis match of roller speed vs engine speed when setting up (but Jim takes great care setting up the car on the roller before doing the power run so bit unlikely)
curve other wise looks ok to me