Wife and I, just did another 10 day journey thru a couple national parks up here in Canada. I knew we would be going thru some mountain passes, where the V10 can get loud . I went to see a buddy of mine that owned a carpet store. He gave me a Black with touch of white sprinkeled in.... rubber/backed piece of outdoor carpet about 6' x 6' , I cut it into mats and a big piece behind dog house. Noise is cut in "HALF". Even driving around normally your talking is a lot quieter because of sound deadening........just what happened to us. It made a huge difference.
Rubber backing doesn't slide near gas peddle or when driving at all.