Now with the Gen 2s this ducted air not only cools the brake, but helps cool the outer CV axle and I would think a little on the wheel bearing. Regardless simple upgrade and is also IMSA approved for upgrading to Gen1s. Part Numbers are 991.575.334.8A and 991.575.333.8A . Like $130 each IIRC (so essentially free in Cupcar terms). Thought some of you might be interested.