Mazda MX-5 Miata (2016, 2017, 2018)
Mazda MX-5 Miata RF (2016, 2017, 2018)
Only slightly heavier than the factory brace but much stronger. Very well made. Looks great. Car feels more solid. It definitely made a difference but not as much as the rear brace. I installed at the same time as the front performance bar so not sure which is more impactful on rigidity.
It did come with an "Under Cover Mounting Bracket" that is meant to attach a cover to. You can see that in the 3rd picture above. There's no cover on my Miata in that spot. I have a 2016. Maybe they added the cover later at some point.