Depending on what system you have. I have the basic system. Sizes are 6x9" front door & 6.5" rear doors. There are two in the dash at the bottom of that A pillars and those are 1.5" tweeters. I haven't had a chance to replace mine yet so the level of difficulty I can't comment. Hope this helps.hey has anyone swapped out there factory speakers yet? if so what are the sizes and how easy was the install?