Pioneer JDT1212 12-Disc CD Player MagazineThis is a direct replacement for the 12-DISC CD Magazine that came with the GM factory installed 12-DISC changer in my 2003 Corvette.Form, Fit and Function are excellent! I bought two and both equally work the same. I have had these for just over a month at the time of this review and fully loaded, switched back and forth multiple times with no hangups. They also have functioned in many different outside temperature ranges from the mid teens and as high as low 90's after being left in the car. For changer model number I used these in go to the following link.http://forums.corvetteforum.com/c5-general/2197675-cd-mag-for-factory-cd-changer-on-03-c5.html