Revolution Gear and Axle Discovery Series 4340 Chromoly Front Axle Kit, fits 2007-18 Jeep Wrangler JK Sport and Sahara Models with Dana 30 front axle and 27 Spline axles. This front axle kit utilizes larger Spicer 1350 Style U-Joints providing a substantial increase in strength over the smaller 5-760X U-Joint and allows extra clearance for tighter turning. This Revolution Gear and Axle Front Axle Kits comes with Qty2 4340 Chromoly Inner Axles Qty2 4340 Chromoly Outer Stub Axles Qty2 Dana Spicer 5-7166X U-Joints Qty8 Full Circle Snap rings to hold it all together. Revolution Gear and Axle 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-transferable. U-Joints are only covered under warranty against manufacturing defects for 1 Year (Front Axle Kits with Revolution Gear HD Chromoly U-Joints carry a limited 10 Year Warranty). Parts subject to normal wear are not covered under warranty; this includes bearings and seals. Revolution Gear and Axle reserves the right to either axle replacement or credit after the first warranty claim.