be ready to spend a good amount of $$$ for sound deadining if you dont know where the rattle is coming from. youll have 2 do your whole interior. dynamat does help by making the metal a lil thicker therefore it has more mass and less likely to move. about the road noise from the tires the dynamat will work only to a certain point and then the sound will be comin through your window and such. just learn to live with it i thougt mine mad a good amount of noise then 2 me ut just diassapeared but everyone of my friends noticed it