Why did the Camaro Gain weight over the years?
Several reasons. Most of the weight was added due to increasingly heavier bumper structure. If you look at the exploded diagrams for the bumpers, you’ll see what I mean. Also, engine emission controls (catalytic converter beginning in 1975) added weight. As more and more fancy options became standard, they added weight to the base model, and the availability of more sophisticated power options, A/C systems, and convinience options with their additional sound deadener, wiring and electrical motors added weight.