cr_2dman

I think ? dampers were changed (read softened) more sound deadening in the roof liner they added rear wheel spacers

for people who wants to know more of the NVH stuff: https://www.clublexus.com/forums/ls-3rd-gen-2001-2006/947764-diy-ls430-dynamic-dampers-install-to-reduce-suspension-steering-vibrations.html

i have the booming issue on my skoda octavia facelift mk3 , 1.5 tsi. It irritates me. My wife doesn't hear it (or doesn't care) I've even driven the exact same car in a test center, it also had the boom.