thanks for the info guys. I'm guessing the four injectors I posted originally are all aftermarket or something. I cleaned them all off to the point I can see the machining marks and no numbers. maybe they were printed on and not etched into the metal surface? oh well. I will just continue with my bags I guess.
Yeah about that...I had a few that had slight surface corrosion and had the same result after trying to clean it up.
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