Has anyone install these woofers in the doors of their truck? I want to try to install them in all four doors. I'm sure they will fit in the front doors but not sure about the rear. Any info would be appreciated. Thanks.

That is a subwoofer......If you were to put those in all four doors, you would still need to install true midrange speakers, (and of course tweeters) elswhere. unless your talking about adding them (front) in different locations....as far as the rear, because of the window regulators you would need to build the bottom of the door panel out with fiberglass...if you give more info i will try to help you...I use jl's 6w0's (as subwoofers) alot in exotics where space is an issue....

I was thinking of putting kick panels up front with 5.25 components and most likey 6.5 components in the rear. What do you think?

That caliber of speakers will rattle the hell out of your doors and sound like poo poo. Just my opinion thought! :D I put 3 JL 3w 8's behind the seat and it sounds awesome!

You would have to seal off the doors for that to have a chance. Stick with something under or behind the seat and put the rest of your effort to good front comps. Don't spend much on the rear as you want the stage in front of you. If you do something in the back doors coax's are fine enough for rear fill if you need it.

The 6W0 is advertized as a sub, but it is not. It is meant to be a mid-bass woofer. The doors will need to be dynamated.