What are these Penske Shocks?

Just curious if anyone can tell me what these penske shocks? I'm tryiing to find details on line, are they 8000 series. I had my shock man pull them down. they have conventional shims but the bottom cap is retained by a circlip. Also the canister uses a shim stack not the normal bleed hole 8100 type.

I've been cleaning out the garage which is why I have so many Penskes bit and pieces.

Thanks in advance

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