PSC Motorsports

PSC Big Bore XD Cylinder Assist Steering Kit, 2012-18 Jeep JK 3.6L with Currie/Dynatrac/G2 Core/Teraflex D44 and Spicer UD60 Axle

Non Stocking Item- Lead Times Vary Based On Availability
40.00 LBS


PSC steering 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 our top of the line components including the BIG BORE XD Steering Gearbox, High-Performance Power Steering Pump Kit with Remote Reservoir, High Pressure Hose Conversion, Steering Assist Cylinder with Hardware, 1.5" Tie Rod Clamp, Fluid Cooler, and SWEPCO 715 Power Steering Fluid.

For the daily driver or a project that is not quite ready for a steering assist cylinder installation, we offer the Adventure Series Kit, with or without Cylinder Assist capability.

Every PSC BIG BORE XD Cylinder Assist Steering Kit is complete with everything needed for a successful installation.

  • For Dynatrac/G2/Teraflex D44 or Ultimate D60 Axle
  • Increased torque output
  • Relieves stress on steering gearbox and frame mounts
  • Steering Assist Cylinder acts as a dynamic steering stabilizer
  • SG688R Big Bore XD2 Cylinder Assist Steering Gear Box
  • High Flow Pump Kit
  • Heat sink fluid cooler
  • SC2223K Steering Assist Cylinder Kit
  • Tie Rod Clamp (available in 1 1/4", 1 3/8", 1 1/2", 1 5/8", and 1 3/4" sizes)
  • SWEPCO 715 Power Steering Fluid


  • SG688R Big Bore XD Steering Gearbox
  • High Volume Pump and Reservoir Kit
  • Upgraded OEM-Style High Pressure Hose Assembly
  • Fluid Cooler Kit
  • Steering Assist Cylinder with Hardware
  • Assist Cylinder Installation Hose Kit
  • Tie Rod Clamp (Kits sold thru PSC Distribution Partners always include TRCL09B, 1-1/2") 
  • SWEPCO 715 Power Steering Fluid, QTY 3


  • Use HWK-688-PP hardware kit when installing a Synergy MFG Track Bar and Sector Shaft Brace with this product.
  • Using the SHORTER Factory or the standard PSC supplied bolts with the Synergy MFG Track Bar and Sector Shaft Brace could result in steering gearbox case failure.
  • The larger size of the BIG BORE XD Steering Gearbox may prohibit the use of some aftermarket track bars.


2012-18 Jeep JK 3.6L with Aftermarket D44* or Spicer UD60 Axle

*Supported axles include Currie/Dynatrac/G2 Core/Terraflex D44

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