Why doesn't any tuner use any of the parts from Porsche Motorsport to modify the GT3 engine.

In particular I am talking about the intake that is on the RSR. The intake on the RSR has 6 throttle control valves - 1 for each of the 6 cylinders, and along with cam mods and ECU mods and air intake mods allows the motor to run up to 435HP.

In October issue of EVO they have an article on Porsche Motorsports. The 3.6L motor is good for 10,500rpm's and almost 500 normally aspirated power.

I have posted this question before, only to get people telling me that the RSR and cup cars need their engines broken down every race etc etc blah, blah.

But I don't see why or how putting an intake like this would jeopardize liabiliy.

FVD sells intake manifolds for the 964's (6900 Euros) which combined with new cams, and ECU gives another 30HP.
Further the new M5 has 10 throttle control valves for each of its 10 cylinders - and I know that engine wont need to be broken down every few thousand miles.

Does anyone have any legitiamte answers to this?