RCV Performance Ultimate CV Axles simply replace your ARB differential Equipped Dana 30 U-joint axle shafts with a high-strength constant velocity design. Tests prove Ultimate CV Axles to be twice as strong as OEM axle shafts, and they're just as tough at a straight angle as they are at extreme angles - where U-joints are weakest. Ultimate 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. Ultimate CV Axles are low maintenance and operate with a smoothness you can feel - whether off road or on the street. And we back it all with a "No Questions Asked" limited lifetime warranty. Axle set includes right and left CV axle shafts, outer stubs, 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 - contact us for details, or use our Custom Axle Configuration FormPart:Axle ModelTypeARB Equipped Inner SplineOEM Outer SplineRCV Inner SplineRCV Outer SplineARB Equipped Left Inner Axle LengthARB Equipped Right Inner Axle LengthOEM Outer Stub Axle LengthWarranty VoidedBoot TechnologyJeep JK with Dana 30 and ARB Differential Upgrade '07 and up Includes left and right axlesDana 30Unit Bearing3032303218.937"34.563"6.25"Over 35" Tire