Originally posted by L8 Apexing Aussie:
It's a 2-piece, and the x-drilling was not the cause of the failure. The hub of the actual rotor was what cracked, not the friction surface!
Oh yeah, Take a look at those pictures again. Your right the rotor did not crack on the braking surface, However they did crack at those nice holes they drilled in the hub of the rotor to lighten it.
By the way its not even a cross drilled rotor its merely dimpled and thats probably why theres no cracks on the braking surface. The rotor is only 2 piece because it broke into 2 pieces. The only places there are cracks are where holes have been drilled all the way through the metal.
