Are you referring to the serrated metal washers around two of the studs? Those have an extremely important purpose. It is to hold the rotors on while the vehicle is being flipped around on the assembly line. After that, they're meant to be cracked off and thrown away at the first service that involves removing the rotors. You can't buy them anywhere because they serve no other purpose.
Monday, December 8th, 2014 AT 10:27 PM