c7 calipers ended up fitting on the grand am br/o/s. stock c7 rotor with this caliper is 321mm, i see the terrain rotor will be perfect but the buick regal rotor is 345mm. i found a guy with a malibu that swapped from the 321mm rotor to the 345mm with success but they use brembo brakes.

are stock base c7 calipers brembo units?