Even though i'm still breaking in the new brakes, i can feel the difference.. i can feel that they bite a lot more i did use a whole Quart of Syn. brake fluid to fully flush out the system. as for availability, my cousin posted our part # found on our parts in my previous post. not sure when these will be ready for production, but my guess would be sometime after the 2006 Z06 debuts. hope these pics help out w/ any questions.