Enhance the sound quality in your vehicle with this Ballistic Hollow Point Series SDHP-TK trunk kit, which contains 10 pieces of 2mm-thick 12" x 24" butyl-rubber-composite material with an aluminum constraining layer to dampen vibrations.
I purchased this instead of Dyna Mat for my classic 1967 Chevelle. Very surprised at the quality. Quieted down the car considerably and it feels much more solid.