I added a set of 2009 Gsxr 1000 Calipers from ebay. (This paired up with SS lines, a brembo radial master cylinder, and better pads.) They are lighter then the stockers, better construction (No bolts holding it together), and have a much better feel and power felt at the lever. I also had my stock rear sets powder coated. I removed the gilles that I had on there. I did like them a lot, but my knees where killing me half the time when I rode. Not the rear sets fault, mine due to past injuries.