The MGP aluminum covers look pretty good to me, there is a new Mustang at the gym where I go that has them, they look good....pricey but good, and seems to have some heat reducing qualities. I don't think they will fall off, they are not the plastic ones that are glued on. I painted mine, does that make me a wanna be since OEM turn dull gray and rust color?
Im not a fan of stick on stuff. Like i told him its better to paint them or if you really want them to look good powdercoat.
I would think they would make things hotter not cooler.
For $500 i could buy 4 brand new powdercoated calipers. $200 is way too much for covers.