K11 Micra Rear Caliper Conversion KitK11 Micra Rear Caliper Conversion Kit As used and tested our our 450hp Time Attack K11 Micra! This kit converts your DRUM Axle to a caliper and disc assembly. Why? K11 Micra Disc Axles are getting harder to source. the Calipers used on the K11 Disc axles were proprietary to the K11 and were not shared on ANY other Nissan and as a result, replacement carriers, calipers and spare components either are very expensive or do not exist. Our kit uses a