Sound deadening for cars.
Kit contains nine 18" x 32" pieces of Dynamat Xtreme for rear decks, doors, floors and trunk floors. Unlike Dynamat Original, Dynamat Xtreme is also recommended for trunk lids, roofs, quarter panels and under-hood installations.
Dynamat Bulk Pack
Part Number:# 10455
Contents: (9) 18"x 32" (457mm x 812mm) pieces of Dynamat Xtreme
Application: Use on rear decks, doors, floors and the floor of your trunk to get more bass, more music, lower road noise and better sound.
Not sure how long the free shipping goes for. Worth looking around the site.
Is installation difficult?