I was sold sr20 injectors and got these, I usually see them with purple tops so I was hoping someone could tell me something about these. Maybe they are usdm n/a sr injectors? just a guess. The color of the tops is a dark grey if the picture doesn't look right, it looks a little blue on my screen but they aren't. Also, does it matter that the plastic is messed up on the top like the one I'm holding?