RCV Performance Ultimate 300M CV Axles simply replace your Ford Dana 60 U-joint axle shafts with a high-strength constant velocity design. These CV axles were designed at the request of champion off road racers. They wanted the smoothness of RCV Ultimate CV axles with additional strength to handle major league abuse. We came to their rescue with Ultimate CV Axles made from 300M alloy steel. These axles are just as tough at a straight angle as they are at extreme angles - where U-joints are weakest. Ultimate 300M CV Axles also eliminate U-joint binding to allow smooth transfer power to the ground. Even if you have big tires and big power there are no worries. These axles are low maintenance and operate with a smoothness you can feel - whether off road or on the street. All backed with a "No Questions Asked" limited lifetime warranty.Axle set includes right and left CV axle shafts, SST seals and installation tool, installation instructions, synthetic moly grease, and installation hardware. Black oxide coating is standard. Optional nickel plating is available for extra corrosion resistance in salty environments.