Here's what I installed last summer - 5 sheets of:
http://www.partsexpress.com/pe/pshowdetl.cfm?&PartNumber=268-020&Did=7
Super, super inexpensive and worked extremely well. I cut the sheets into many
smaller pieces to fit all the nooks and crannies in the vanagon. Installed it
in the rear hatch, in driver and passenger doors (which now go "thunk" rather
than "twannnnnnnng" when hit), in the sliding door and over the engine
compartment and rear right side (westy cabinet prevents installing on right
side). You will also need to get the heavy duty rear hatch supports as the
weight of the material causes the rear hatch to automatically close. This stuff
is rather heavy. Some comments after installing - yes, the van is substantially
quieter. But I used to enjoy going down the road and relaxing - sometimes with
radio off and listening to engine go Bzzzzzzzzzzzzz and watching the scenery go
by. Now I can hardly hear the engine with the windows closed and need to pay
more attention when shifting. Plus, every g*ddamn squeak, rattle, clang, chirp,
and buzz from everything like the sink/stove lid, stuff in the cabinets, the
rear seat lid, etc now stands out and makes me go a little BATTY after a while.
The engine and road noise aren't so bad, but all the squeaks drive me KRAZIE so
I now MUST drive with the radio on.
ftp://ftp.cottagesoft.com/users/jboldway/quietvw.jpg

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