BTW, the yard bags are soft cloth and weather proof. With top closed the act as curtains to hide noise mitigation work. They also isolate some noise. With top open, the " curtains" protect the adhered edges of the carpet mitigation.
I was shocked at the noise level at hwy. speed with the top closed. I can't drive to Gaylord like that. Using vehicle development skills honed at Chelsea Proving Grounds, I have a fix that should work for you and others. It involves mitigation and isolation of the noise. I started by tightening...