You are purchasing new, complete, and fully assembled ATV axles, including both inboard and outboard CV/universal joints, as shown.Vehicle: 2009 Yamaha 400 Big Bear 4X4Submodel: YFM40FBYGR YFM40FBHY YFM40FBYB YFM40FBYLAxle Location: Front Left, Front Right, Rear Left, Rear RightThe Sixity XTA Series Severe-Duty OE-replacement ATV/UTV axles are proven to deliver maximal durability and torque for extreme off-roading quads, 4-wheelers, and side-by-sides. Made from 4340 chrome-moly steel alloy for robust durability through the ultimate demanding terrain, Sixity XTA CV axles vastly outperform OEM axles in both quality and price.