I can post pics of them but I dont know how they install really..
But I can see how they work. Brake ducts will cool the rotors too much on highway use with not much braking. Cold brakes dont stop well, so you allow air to flow thru and not cool the rotors as much on the street. This way the brakes heat up and stay a normal operating temp. More agressive track pads need heat to be able to stop good...
Pics of cooling rings
to compare size..
