dampener

What do you guys think about this: http://www.koreanautoimports.com/store/product_info.php?cPath=31_237_239&products_id=1632 Would this make the car more quiet or does the Genesis already have this type of kit that is either the same quality or better?

Hi, Does anyone have any experience in sound damperner kits? Do they really work or just mentally work in your head but not noticiablly quieter in real world? Here is a link to the product: http://www.koreanautoimports.com/store/product_info.php?cPath=31_237_239&products_id=1632 Thanks for...