[Aquarius]

As BluePhoenix said, the dual exhaust upgrade needs to be added on at the assembly line. This is due to wiring that the valves need to open and close for the driver to adjust the exhaust noise from the touchscreen inside the cabin. It is not an option the dealership can add after the car has been built. That being said, there are many aftermarket exhaust options available for the Camaro, in all of its trims, that do not require the wiring for electronically controlled exhaust. Also, putting any of these on should not void your warranty. It would only void the car's warranty if something on your car breaks and the aftermarket part, or modification, was the reason for the damage.