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These are definitely NOT oem rotors that have been machined. The specs are identical (ie they are not thick-cheek like the other GM rotors), but the casting is entirely new. They are Not stamped "made in brazil" like the other sets, and the "vanes" are slightly thicker than the oems. The finish is much shinier than the oems, but I don't think they are plated. They weight 36lb, just like the oems and thick-cheeks.
The thick-cheek rotors have the same overall dimension as these rotors, but the "cheeks" are approx 1/32" thicker, inside and outside surfaces. Should last longer before cracking.
An interesting note, where-as the oem and thick-cheeks are CAST with the min thickenes 30.3mm, these have the min-thickness STAMPED in, and it is listed in standard units (1.195").
Dave
The thick-cheek rotors have the same overall dimension as these rotors, but the "cheeks" are approx 1/32" thicker, inside and outside surfaces. Should last longer before cracking.
An interesting note, where-as the oem and thick-cheeks are CAST with the min thickenes 30.3mm, these have the min-thickness STAMPED in, and it is listed in standard units (1.195").
Dave
