Glad to see this project is getting closer to coming into fruition. Sure took a long time to get a matching set (left & right) of current gen X5 M calipers that had no substantial paint chips on the outward facing areas. Almost gave up on this at one point. But then I remembered how much I love driving the X3 MC fast. And how well the 4-piston factory brakes slow down this 4,600 lb beast when driving aggressively. Can't wait to "finally" install these & see how well she stops. With the same braking system as the M5 & M8 now, I think she'll stop on a dime pretty well...