Overview The BIG BORE XD-JK with Cylinder Assistâ„¢ Ports is the most powerful and strongest replacement steering gear on the market for the Jeep JK. Any Jeep JK with larger tires and/or locking front differential needs this bolt-on upgrade. The BIG BORE XD-JK, when combined with our PK38JP1 or PK36JP1 Pump Kit, provides up to 35% more turning power over the factory steering gear. The sector shaft diameter has been increased from 35MM to 45MM to handle the extra torque output and prevent shear in severe environments. Every Big Bore XD-JK Steering Gear includes a NEW proprietary Pitman arm designed for the larger sector shaft. When adding an Assist Cylinderâ„¢ Kit to your project, the SG688R already includes the Ports required to power it. Improved on-the-road driving characteristics and significantly increased torque output are achieved by using a 16:1 80MM piston assembly. This increased torque output will turn tire sizes up to 35" without the installation of cylinder assist, and will enable you to enjoy superb on-the-road handling as well as tackle 5-10 rated trails with ease.

FEATURES:
45MM Sector Shaft NEW XD-JK Proprietary Pitman arm 16:1 Ratio 80MM Piston Assembly Reinforced Mounting Pad and Case