If you have the Shaker 500 or 1000 in your car, you will need to be extra careful in replacing the factory door speakers because it's an amplified system. you need to make sure to get aftermarket speakers that will work with the shaker amplified system (if you have it). otherwise you could tear up some nice expensive speakers or if nothing else, end up with badly distorted sound. of course, if you don't have the shaker stereo, then disregard everything i just said.