My sound deadening mod list so far
1. sunroof elastic (no improvement at all)
2. rubber sound deadening for doors, trunk, frunk bought on ebay (no improvement at all)
3. A pillar gap filling (slightly improvement)
4. Four wheel wells sound deadening (see below)
Feedback: I am using Falken FK510, it claims to be quieter than Michelin PS4. After spending 4hrs putting the sound deadening material, I feel there is only marginally improved. I put the same kit on my 2012 Mazda 5, it was day and night difference, so I am bit disappointed here. The car A/C esd off and no audio turned on while testing: on newly paved road, definitely a bit quiet, but on rough concrete, the noise is absurd.
Should you do it? NO, unless you enjoy the process of ripping things out, sure.