Dynamat Xtreme Wedge Pack
Crutchfield Customer Review (What's this?)
Good stuff. Gets rid of vibrations and rattles. Only gave it 4 stars because it is expensive. Also, it comes rolled up, which makes peaks and valleys, think topographical map. You can see the peaks and valleys in the picture. Seems if it came shipped flat, not rolled, from the factory it would be flat and be easier to roll out once stuck to the panel. Just an observation though not a deal breaker. Adhesive is strong and sticks very well in spite of this.
Pros: Reduces rattles and vibrations