This Stage 1 Ultimate Front End Kit for the 2007-2018 Jeep Wrangler JK features of a full set of front upper and lower Dynatrac HD BallJoints. Dynatrac HD Balljoints feature heat-treated high-strength billet bodies with chromoly stems along with a heat-treated, precision-ground stainless-steel ball. Unique seals prevent contamination, and the ball joints have greaseable fittings and PTFE-coated wear points to provide a long, durable service life. These high-end ball joints also use an exclusive snap-ring safety feature design to prevent the ball joint bodies from moving in the axle housing under the heavy weight of large tires in extreme terrain. A Dynatrac installation kit is also included to make install a simple, straight forward process. The OEM ball joints often wear quickly with larger off-road tires, many road miles, or extreme off-roading. Replacing worn factory ball joints with Dynatrac HD BallJoints, built specifically for the rigorous demands of these vehicles, provides a long-term solution and help maximize the overall drivability of the Jeep Wrangler.