Dynamat DynaPad Get rid of road noise 1 sheet, 12 square fee
Works!, what more can I say.  Completely gutted and sound deadened my 2002 Ram Air T/A interior with 36 sheets of DynaMat and two rolls of DynaPad. Much quieter, barely discernible road & exhaust noise.  New sound system kicks now with added insulation.  Can actually use hands free Bluetooth without having to yell in microphone.    Expensive but worth it now that I installed it.  The DynaMat Pro Roller is a must for install.