[GRX]

Agreed. I would fix that & remove the shards before firing it up. And check that valve/rocker assembly closely to make sure something didn't cause that deflector to break.
As hayhauler71 said, those are rotating retainers on the exhaust. As a side note ... for the 1st couple years Chevy used shorter exhaust springs to accommodate the thicker retainers, until the machines were re-tooled cutting the spring seats lower allowing all springs to be the same.