Fits front, left or right on the following Yamaha ATV models: 2002-2006 Big Bear 400 4x4 (models without IRS). Features a 4140 chromoly steel bar for a higher tensile strenth and more durability. Engineered as a direct replacement, fully-assembled, and ready to install. Joints fitted with neoprene CV boots for flexibility and resistance to hot/cold temperatures. Utilizes high-performance moly grease for protection against the environment and to keep vital components lubricated. Replaces OEM # 5FU-F510F-00-00, 5GH-2510J-00-00. Compressed length - 511 mm, Inner spline count - 21, Outer spline count - 27. Warranty: 2 Years (excluding torn boots & use on lifted vehicles). Lift kit voids warranty, parts are not designed to be used on modified suspensions. Fits front left or right on the 2002-2006 Yamaha Big Bear 400 4x4 ATV * Features a stronger than OEM chromoly steel shaft fitted with neoprene boots filled with moly based grease for added wear and puncture resistance * Compressed Length - 511 mm, inner Spline Count - 21, outer Spline Count - 27 * Replaces OE # 5FU-F510F-00-00, 5GH-2510J-00-00.