Perhaps they used it because it is hard, and would last longer?Z Draci said:Silicone carbine is a very common crystalline material used for special grit paper, dental grinders, and also blade sharpening stones.
Silicone carbine is also used to hone out cylinders in engines.
It's actually an abrasive material. I wonder what good its use was on the GT's drivetrain. (Increased wear = increase in dealer service intervals?)