[vtirocz]

The evidence seems overwhelming that these are catalytic converters.

1. The heat shields that are bolted on these rear (that sit lower, close to the ground) catalytic converters is a dead giveaway that they are catalysts and not a resonator of some kind.
2. Picture of internals shows the substrate.
3. Based on the post linked above, Borla indicated the EPA got involved in their exhaust setup which changed out the rear catalysts. That's the nail in the coffin (for me) on this one.

How much more evidence do we really need? It takes a long time to the Camaro team to answer these questions so we need to be selective about which questions get asked (hence the voting process). I can't see this one getting selected.

OP: This might be something that you can ask at Camaro Fest if you plan to go. Or another member could ask for you to confirm 110% that these are catalysts.