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.
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I installed this kit in the trunk of my mustang and noticed a reduction in sound by 50%. I have very loud exhaust and it is more tolerable on the inside now. This is the exact same material as Dynamat Extreme with a better price tag!