Less-so improvements and more-so suggestions for other places you can add sound damping. We chose to only add sound damping to the wheel wells because this is one of the most noisy areas of the van. To some degree, thermal insulation also acts as a sound dampener, so we opted for not adding sound damping elsewhere. Having driven on the road for a while, we have come to notice that the van has new noises everyday from panels creaking, things raddling, etc. Once you add snow tires, it gets even louder. So, you may want to consider also adding sound damping material to the walls, ceiling, and driving area of the van.