This is not a "performance" part. Basically, it's just a red powder-coated caliper. Both calipers that I received appeared to have been removed at some point during the restoration process, but before the coating process. I had to dremel a bit on both calipers in the area where the pads slide, otherwise they would not be usable. My regret is that I didn't just buy these parts locally to easily troubleshoot problems. Lesson learned.