HELP! Anyone know what this is!?

[Schweitzermatt]

So I’m about to finish up my cam and lifter swap on my 2013 5.7 I’ve damn near got everything buttoned up and I’m cleaning the floor under the truck and find this…..I know it’s a long shot but it also looks kind of important….

 

[Moose410]

Well I’m finally going to get my 35x12.50x20 tires in the morning.