37Z

I use the same stuff and installed it earlier this year. It is best to install the sound deadening stuff to the wheel wells inside the hatch area for the most reduction in unwanted noise. You may want to consider using their roll on material on the outside of the rear wheel wells. The metal is thin is this area.

Also, add the material to the inside of the doors (involves removal of the door trim panels and the door acess panels). The door trim panels are easy to remove (see Sliknik vid). The door access panels are a job to remove (have to remove the window motors).

I notice a good improvement.