Categories 3.5" Rubicon Express 3.5 Inch 4 Link Long Arm Lift Kit 07-18 JK Extreme Duty – JK4423 Post author By emboss Post date October 7, 2018 Tags Four Link Kits ← Rubicon Express JK Control Arm Rear Upper Adjustable Extreme duty 07-18 JK/JKU – RE4540 → Rubicon Express 3.5 Inch 4 Link Lift Kit W/Mono Tube Shocks 07-18 JK Extreme Duty – JK4423M