An automaker cannot sell a car here unless it is federalized, and last I knew, TUV tests cannot be substituted for DOT tests (as obscene as that is). Also of note, the DOT considers manual and automatic cars different models in terms of federalization, and this is why you cannot buy a manual E or S class, A8, or other cars which are commonly found in manual form in Europe here. To their credit, BMW goes to great lengths to bring us manual 5 series cars.
Porsche's cars get tested like everyone else's, perhaps not by the IIHS for reasons discussed above, but you can be damn sure the cars are federalized. As to why you can't find the results, that is a bit puzzling.
Patrick
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