what? also may be better asked in the audio/electronics forum

4" Componets in front doors (4" Speaker and seperate tweeter)
4" in Rear Door
6 3/4" in Rear Deck (6 1/2" for non-BOSE)

The hole pattern in the doors is non standard using 3 screws. You may need to fashion some sort of adapter. MB Quart makes adapters for the front door so you can put a 5 1/4" speaker there. These may also work in the rear doors but I have never tried. You will have to contact a MB Quart dealer to order as MBQ doesn't sell direct to customers. Use their website to find a dealer near you. Good Luck!<ul><li><a href="http://www.mbquart.com/2003/en_US/home/">MB Quart</a></li></ul>