Has anyone here tried these replacement rotor rings from Racing Brake?
They are direct replacements for $444 a SET (13") and hardware that does NOT require washers or Loctite for assembly. This a link to the 13"..but they have 14" also:

http://www.racingbrake.com/Rotor_rin...051-211k-s.htm

 

Found this on RB replacement rotors...take it for what it's worth.

http://www.e90post.com/forums/showpo...91&postcount=1

The slots are also OPEN internally. I have also read accounts where these cracked earlier than Stoptechs on the race track..although they performed well. They are lighter (due to open slotting?)than Stoptechs and run cooler as well.
Oh..check out Vid at Laguna Seca...one of my Favs back in my HAY DAY of racing. (BTW..I was turning 1:43 there in my 944T)

 

I fkn wished my Endless rotors where that much... sigh

 

^yeah that is one of the debates i was going thru when deciding to buy my Stoptech Trophy vs the Project Mu BBKs. The initial cost different isn't too bad but man pad and rotor replacement on those JDM parts are insane.