Well when you are speaking to Ben you may want to point out that he has some of his wires crossed He needs to change the and/or to just pads, perhaps rotors. The GT3 cars do not run Endless, not the calipers at least, and its my experience that the rotors are very commonly Performance Friction, though imagine AP or Brembo are just as popular. Brembo and then AP Racing supply the bulk of GT3, GT2, GT1 and Formula 1 teams. Endless kit is no doubt good, but....