Synergy D30/D44 heavy duty front ball joints



  • Designed to replace the factory ball joints that are prone to premature wear on lifted vehicles with large off-road tires
  • Fully greasable metal on metal design
  • Machined bearing housing made from sintered graphite, bronze, and 1045 steel for a strong, smooth, bearing surface
  • Ball joint stud made from 4140 steel with an induction heat treated bearing surface for smooth operation and maximum life
  • Uses a larger stud than stock
  • Ball joint boot is made from tear/wear resistant silicone polyurethane
  • Completely eliminates the stock style nylon liner for improved performance and durability
  • Outperforms the factory ball joint assembly and includes all necessary hardware for installation
  • Single Set includes: (1) upper, (1) lower
  • 12 Month Unlimited-Warranty (see warranty information)
  • Synergy High Performance Grease (4119) is the recommended grease for this product

PART #  8009-1204  2007-2018 Jeep Wrangler

                                    1999-2004  Jeep Grand Cherokee

PART # 4120-04      1990-1992 Jeep Comanche

                                   1990-2001 Jeep Cherokee

                                   1990-2006 Jeep Wrangler