I laid down some sound deadening material from Noico in the truck recently. The cabs on these old 4runners are pretty noisy when the trucks are stock but when it’s built like mine is, there is a ton of road noise. While I originally had wanted to put down Dynamat, this Noico stuff worked just as well as Dynamat does. Interestingly, Noico is made in Russia. I have no idea how Russia is cost competitive with China but evidently it is.