Have a 19 Optima and I just changed all speakers, Kicker and Memphis Audio. The door speakers were easy to do, the dash, not so much. Stock radio will push but is has to be turned up very high for good volume level. Will need a special screw driver to get the dash speakers out. You will need a mounting bracket for each door speaker. If you order from Crutchfield they will come with your order. Some speakers come with the bracket needed.