This set of new CV axles fit the 2002 Yamaha Grizzly 660 4x4 ATV * Features stronger than OEM chromoly forged steel axle bars * Greased with a moly based grease to provide superior joint lubrication * Fitted with neoprene CV boots for added wear and puncture resistance * Compressed Length: FL - 551 mm, FR - 509.5 mm, RL - 557 mm, RR - 511 mm, inner Spline Count: fronts - 21, rears - 39, outer Spline Count: fronts - 27, rears - 27 * Replaces Yamaha OEM # (fronts) 5KM-2510J-00-00, 5KM-2510F-00-00, 5KM-2510J-10-00, 5KM-2510F-00-00, (rears) 5KM-2530T-00-00, 5KM-2530V-00-00, 5KM-2530T-00-00, 5KM-2530V-00-00.