Bought both of these, different vendor on eBay, but they look identical. Offhand, I'd say I paid $150 total. The s&h from China for the rear one was $38, alone! I don't know how these vendors make any money.
Do they help? The rear one probably helps a little, since the trunk is an echo chamber, and with the hole in the rear deck, that sound would come into the cabin. The frunk one is all aesthetics. For sound dampening, you'd be better off lining the tub of the frunk, rather than the hood. I also did the front wheel arches, and those might help a little as well, but who knows? I didn't do anything scientific and try to measure sound levels or frequencies. I think after all the things I did, the sound seems better, less irritating, but that could be partly placebo, and partly all the little things I did. And, of course, some of the improvement is in the frequency levels, not necessarily in the overall sound level.
Would I do it again? Sure, they help and were cheap and easy to do. And even if it's a placebo, we know placebos work!
