Outer door shells?

[HAULIN IT]

Skunk, Evercoat makes nice tar-like sheet sound deadening that works well. They are about an 1/8" thick x about 16" square. They will bend slightly for ribs & grooves. I put Three pieces in the doors, one (cut down) in the area between the mirror & the door handle & Two side by side in the center, just below the bodyline. This makes the doors "feel" much more solid, taking out the tinny vibration. I put them in the door, down through the window hole before the window, weatherstrips, ect. go in, you can reach through the big hole on the inside to push them down. A yardstick or similar item can help also. Lorne   

[eventhorizon66]

Just so you know, Lorne is referring to the Q-pads.  They are very similar to what OEMs use.

[Skunksmash]

Is that the non-sticky stuff? Dynamat has that sticky black stuff.

[HAULIN IT]

Skunk, Those ones are sticky, just peel of the plastic & stick.

[GoatBeard]

This is what I used and it's WAY cheaper than Dynomat.  You can get it at Home Depot and I believe it was $30 per roll.  If you go this route, get some foil tape and put it over the joints.