If you have upgraded the factory 27 spline hubs in your TJ/LJ to 30 splines, these are the axles you need. RCV Performance Ultimate CV Axles simply replace your Jeep LJ or TJ Rubicon's weak Dana 44 U-joint axle shafts with a high-strength constant velocity design. Tests prove Ultimate CV Axles to be twice as strong as OEM Jeep 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, 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 Form.**Bearings Not Included. Part:Axle Model:OEM Inner Spline:OEM Outer Spline:RCV Inner Spline:RCV Outer Spline:OEM Left Inner Axle Length:OEM Right Inner Axle Length:OEM Outer Stub Axle Length:Warranty Voided:Boot Technology:'03 to '06 Jeep Wrangler Rubicon (TJ -LJ) with Upgraded 30 Spline Hubs. Includes left and right axlesDana 4430273030* (Upgraded for 30 spline hubs)16.9"31.88"6.11" (30 Spline)Over 40" Tire