As far as I know RS Tuning are the only company with a dedicated Porsche turbo engine dyno with the correct cooling to be able to replicate Porsche's own engine dynos.

There are many graphs for the various models on the Cargraphic website and the graphs for the tuning kits always include a baseline power and torque measurement.

All of the base runs are virtually spot on with Porsche's own measurements to within a couple of PS - All except the 997GT2 where the maximum torque measured is only 621NM - I have drawn in (badly) the factory curve for comparison. Interestingly the engine makes exactly its full power at 6500rpm but something is amiss lower down. The 997tt torque curve without sport chrono is spot on as are all the others so something is definately up with the GT2 they measured.... I will investigate further...