[Mahler9th]

No, they don't. As I recall, one of the first kits available was the Cool Brake from Holbert's back in the 80's when I got started. The AJ USA has been around for a long time as well. I think Jason over at Paragon Products sells something called the NERP kit.


Or one can fabricate their own. I always suggest coming up with a way to seal off the backside of the rotor opening since the kits cannot accommodate all sizes of rotors. I fab plates out of carbon fiber and carbon kevlar for this purpose. But thin sheet metal or fiberglass can be fine as well. These pieces can be attached to the kit's backing plates to enlargen the ID, or if one is clever and motivated, one can just make their own backing plates to attach to the spindles and/or struts.

Years ago, Smart Racing Products made and sold some thin sheet metal deflectors for certain 911 hubs to ensure that all air introduced into the rotors via the backing plates would be forced through the rotor vanes. I cannot remember for sure, but I think Craig (now the chief engineer for the Lizards) got the idea from age-old racing approaches. This concept is also described in the Puhn brake handbook, which I recommend as standard reference material for the more complete libraries.

Even if SRP no longer sells these, they are easy to fab up. I always make my own.