Deleted

[alvinlwh]

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[ad456]

Look like they maybe to fill the piggyback. The solid one will be to remove the effect I’d imagine and the foam one might cause some kind of progressive effect? 

[Frog Jumper]

Mounting hardware???

[alvinlwh]

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[ad456]

On more reflection the foam will go in the bottom and the top could be the plunger. Much like 1:1 ones work. The piggybacks aren’t always necessarily meant to be filled up with oil. Sometimes they have a setup like that to absorb harsh landings. Saw it on YouTube on V2vids channel maybe on a 1:1 monster truck shock rebuild. 
 The O-rings will be bump stops for the base of the shock shaft above the shock perch.

edit : the difference is piggyback vs reservoir shocks. Reservoir hold oil and piggyback helps. Someone hopefully will step in with better knowledge if I’m wrong.  
 

edit 2: there is a rather scathing thread or two over on rccrawler.com about these. They are very similar to (or just plain rebranded) TopCad shocks. The foam and aluminium parts are indeed meant to go in the piggyback to tune the compression rate from what I can follow. 

Edited October 13, 2023 by ad456