How can I tell for sure what brand of calipers were used on the car? I changed the pads the other day and I swear they didn't seem to be the same side to side. One caliper appears to have some kind of heat shield around the piston. I'm not sure if the other one had it or not. Other than that they seemed pretty much the same, pins holding in the pads and a spring piece under the pins. Car stop strong, no pull.