Go to Crutchfield.com and you can use the site to input your vehicle like a previous poster mentioned.
I would suggest going with a component speaker because as you know the speakers are next to you knees, and there is a spot in the front door panel that will fit a tweeter. And the front door, if all you are doing is a speaker swap, I have an scab and it is much harder replacing the rear speakers. But, Crutchfield will give you written directons on how to remove/install your new speakers. Before you buy online, call one of the sales consultants and tell them what amp and head unit you will be using and they will help you with your decision. I was leery but they saved me $$ and sold me something lower priced. Go figure
Check the forum audio sticky too before you do your project.
Last edited by '08f150stx; 10-13-2011 at 01:15 AM.