2007-18 JK Dana 30 4340 Chromoly Discovery Series Front Kit Revolution Gear and AxleRevolution Gear and Axle Discovery Series Dana 30, 4340 Chromoly Front Axle Kit for 07 18 Jeep Wrangler JK Sahara and X Model with 27 Splines, without Locker. Kit comes with 2 inner axles, 2 outer stub axles, 2 Dana Spicer 5 760X U joints and 8 Full Circle Snap rings to hold it all together. All Discovery Series Axles are backed by a 10 Year Warranty covering manufacturing defects and axle breakage, bent axles and twisted splines. This warranty is non