Can 02 Bose stereo be changed for 03?
 

Just bought an 02 C4S and it has a stock high end Bose radio. As I understand it, it comes with amps and a certain amount of factory speakers designed for that radio. I now have found out that the 03 stereo is changed to a much richer sounding unit. My question is can I change out the radio for a stock 03 unit with my existing speakers and amp, or was it designed for a stronger amp?