Originally Posted by faiz23

if you really want to take care of the issue then use around 20-30 sq ft of regular damplifier around the trunk and add luxury liner pro which is a heavy closed cell foam with vinyl backing to cut down on noise


here is the description of it,

Luxury Liner Pro is our best noise barrier. It consists of a heavy vinly barrier, bonded to a closed cell acoustic foam. Apply a layer of Luxury Liner Pro on top of a vibration damper to filter out, and reflect airborne sound waves away from the car. If your goal is tomb-like silence, Luxury Liner Pro is a must.


the deadener reduces vibration and the foam reduces sound waves and noise.