BIG BORE XD Cylinder Assist Steering Kit for 2012-18 Jeep JK 3.6L with OEM Axle

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  • Regular price $2,699.45
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Quick Overview

PSC has developed the BIG BORE XD Steering Kits to be the ultimate steering upgrade package for Jeep JK/JKUs equipped with locking differentials, aftermarket axles, and up to 44" tire sizes.

All kits include top of the line components including the BIG BORE XD Steering Gear, High-Performance Power Steering Pump Kit with Remote Reservoir, High Pressure Hose Conversion, Steering Assist Cylinder with Hardware, 1-1/2" Tie Rod Clamp, Fluid Cooler, and SWEPCO 715 Power Steering Fluid.  

Offered as a standard kit or with Radial Dynamics premium upgrade (see details below)


  • 2012-18 Jeep JK 3.6L with OEM Axle

Standard Kit Includes:

  • SG688R Big Bore XD Steering Gear
  • PK1859 Complete Pump Kit, includes Fluid Reservoir, Fluid Cooler, Anti-Splash Valve, Serpentine Drive Belt, Brackets, Hoses, & Fittings, and 3 QTS SWEPCO 715 Power Steering Fluid
    • *NOTE* PK1859 is not compatible on vehicles with a supercharger installed
  • ACK281 No-Weld, Bolt-On Assist Cylinder Kit, includes 1.75 X 6.75 Assist Cylinder, No-Weld, Bolt-On Assist Cylinder Mounting Bracket, Assist Cylinder Installation Hose Kit, Rod Ends and 1-1/2" Tie Rod Clamp

Radial Dynamics Premium Upgrade:

For even better performance and reliability, select components in the above kit are replaced with the following premium Radial Dynamics components:

  • Patented 3.5" Vortex Reservoir
  • 4.5 GPM CB-X steering pump
  • High quality remote spin-on filter
  • Premium inline fluid cooler