Yukon 4340 Chrome-Moly for Dana Spicer 60, 70, and 80 with a length of 40"- 43.5" inches, 35 splines and has a 8x3.96 bolt pattern. Yukon 4340 Chrome-Moly axles provide up to 50% increased strength over stock axles for use in extreme performance applications with large tires and high horsepower. Yukon’s 4340 axles are manufactured using the latest technologies and the highest quality materials to ensure high strength and long life. This axle comes with a 5 year warranty.