I am upgrading my speaker system, What are ther size's of the speaker's? Doors, Rear and what can i use for the subs?

 

Go to the Crutchfield web site. Everything is explained there.
MJD

 

6.5" components up front
6.5" coax rears

subs...depends on where you want to put it...what kind of sound you are looking for and how much you want to spend

 

The depth in the back 6.5" is amazing and you don't really need to worry.

In the doors you'll need a 1" spacer at least and if you go with some of the bigger/better compents you'll need a bit more than an inch which normally means making a bit of a custom spacer.