Kirby, why do you insist you know better than the guys and gals that engineer the parts? Do you
really think they're all a bunch of idiots that would simply leave critical parts out of a kit because they "forgot"?
You claim no one is listening:
DODGETWEAKER gave a
very plausible explanation that DCX has simply change suppliers from Bosch to Siemens. Why do you chose to ignore that?
Have you studied machine design? If you did it would be clear that a.) The injectors do NOT bottom out in the intake, they are retained in the fuel rail by spring clips. This eliminates your hypothetical conductive heat transfer path. Do you really think that little plastic lip is providing a significant thermal barrier from radiated heat? Did you look closely? The actual spray tips of both injectors are exposed directly to the manifold (as they need to be to inject fuel). b.) The compression of the lower O-rings prevents the injector tip from moving laterally and grounding out or making metal to metal contact.
The reason you can't get the "Thermal Protective Caps" off is because THEY'RE BONDED ON AND AREN'T MEANT TO BE TRANSFERED. (That's not what they are BTW, they should be called "cheap little plastic things that keep the O-ring from pulling out when there's vacuum in the manifold"). If you
did manage to get them onto the Siemens injectors they would most likely fall off, run through the engine and melt away in the turbine.
The 2003 injectors are purple and Stage 1's are black. Should we paint them? Did you check to see if the resistance is the same? Did you verify that the spray pattern, droplet size, cone angle and distribution are the same?