[Bob H]

I have a set of injectors - but 4 are the style I've seen before - the other 4, I haven't seen before.
Can anyone shed some light on the "shiny" ones?
BTW, I have just about everything from that LB7 except the block/crank/main caps/oil pump. Everything else is in my garage if you are interested in something - just let me know as it will all be for sale shortly.
Thanks,
Bobby

"Shiny" unknown one is on the left:

All the parts:

 

[GMDuramax]

So the left one with the two orange o rings is an injector with the injector cups attached. Those o rings seal the water jacket around the cyl so water does not enter the combustion chamber. The right side one is an injector without the injector cup attached.

Those injector cups come out with the injector in some cases and can be pulled off if they come out together. It may be stubborn, but can be separated.

 

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Carefully heat the silver injector cup with a torch and it will come right off.