Summarizing the previous question:  Does the color of the plastic parts on
WBX injectors (yellow or green) have any significance?
In a discussion with my local injector re builder the answer is NO!  Part
number on the injector is the controlling factor.  Bosch has changed colors
on several of their injectors over the years.  And if you really want 'color
confusion', try some of the Rice Burners.
This info is totally consistent with the conclusions of list members on this
subject.
Thanks for all that contributed to the discussion, makes great future
reference in the archives.