Can you see this photo?
That small thing can reduce noise? I hope someone can elaborate on it.
It's not a life changing mod as I have stated before, it helps mildly at mid to freeway speeds. One Japanese owner blogged about it reducing interior noise by about 1 decibel FWIW, the bigger change is probably getting rid of the metallic echo when you shut the door, and keeping a bit of water out while you're washing your cars.