John Fitzpatrick from GM has chimed in with this official answer regarding the weights that have appeared on the brakes of owners taking delivery so far:
Some early Camaro customers noticed that there are weights on the Camaro SS calipers. With high-performance vehicles like the Camaro SS, minor brake noise is not uncommon. The weights act as a damper to reduce noise in certain driving conditions. This was done after careful evaluation and validation by our engineering team. These weights will only be added to early builds of the Camaro SS.
Read more on this story at the following LINK
