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  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of PSC performance steering components on a white background
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
  • Collection of steering gear, cooler, mounts, hardware, reservoir, PSC 715 Steering Fluid, pump pulley, belt and other components.
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Cylinder Assist Steering Kits - Jeep Wrangler JL Rubicon 392 HEMI (2021+)

Cylinder Assist Steering Kits - Jeep Wrangler JL Rubicon 392 HEMI (2021+)

$3,588.54
$3,588.54
Sale Out of Stock
Shipping calculated at checkout.

Part Number: SK689R64JP1-6.75W-1.25

Axle Type
Axle Stroke
Tie Rod Clamp Size

If you’ve got a JL 392 and big tires, you already know the factory steering just doesn’t cut it. Whether you’re running stock axles or a full aftermarket setup, PSC’s Cylinder Assist Steering Kits are built to handle the power of the HEMI and the punishment of off-road driving.

These kits come fully assembled with all the hoses, fittings, brackets, and hardware you need for a clean install. You’ll get our specially valved XD Steering Gear with PSC’s High Flow Tower and custom spool valve, plus an upgraded pump designed to keep up with the demands of the cylinder assist system—whether you're running EHPS or a mechanical setup.

We also include a high-capacity remote reservoir, high-flow heat sink cooler, anti-splash valve, and PSC 715 High-Performance Power Steering Fluid. It’s everything you need to upgrade your steering and keep it rock-solid on the trail and smooth on the street.

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About:About:

Heads‑up for installers

  • Comes pre-assembled for easier install
  • You’ll need a pitman arm puller and a 46mm socket for the nut
  • Use pneumatic anaerobic thread sealant for leak-free fittings
  • If you’re running a Synergy MFG Track Bar Brace (or similar), you must add HWK-689-PP and SYN-8869-10 to avoid steering gear case failure
  • The larger XD gearbox may not clear some aftermarket track bars

Ideal for

Jeep Wrangler JL 392 owners running 35”+ tires

Fitment

Jeep Wrangler JL Rubicon 392 HEMI (2021+)

What’s included

Each kit includes: 

  • (SG693R) Special Valved XD Steering Gear
  • (PK64JP1) 392 HEMI Cylinder Assist Pump Kit (EHPS or mechanical depending on variant)
  • Cylinder Assist Axle Kit (stroke varies by kit)
  • Tie Rod Clamp (size varies by kit or not included) 
  • Hoses, fittings, cooler, anti-splash valve, and PSC 715 fluid 

SupportSupport

Install Instructions

California Prop 65 Warning

California Prop 65 Warning

This product can expose you to chemicals including lead and di (2-ethylhexyl) phthalate, which are known to the State of California to cause cancer, birth defects or other reproductive harm.

For more information, go to www.P65Warnings.ca.gov