FRP REAR BRAKE STAY SET
From the manufacturer:
Brakes can make all the difference on undulating circuits, helping your car to last the distance. This set includes a stay molded in rigid FRP, with a large area to affix brake sponge, and in a shape that is designed to keep away from rollers. A number of holes are in the stay to allow attachment of option parts such as mass dampers and the like. 2mm thickness brake sponge (red) and small parts for attachment are included.