Umm from a third person viewing this all i have seen so far is:
3lit3 32 made some phone calls to some what substanuate his claim that these items are made by Denso to a cetain spec as specified by Power Enterprise.
Dirt Garage has said this is crap and PE only make the packaging for this, but not been able to back it up with any more proof.
I think the person asking the question has the information that yse they are a quality injector, now he needs to make a decision if he wants these instead of nismo ones, unless someone else has some proof to provide.