Big Bore Xd® Cylinder Assist® Steering Kit - Jeep Cj (1972-1979)

Big tires, lockers, and rocky trails will wear out your factory power steering faster than you can say “turn left.” If your CJ’s steering is feeling weak or sloppy, PSC’s Cylinder Assist® Steering Kit is the fix you’ve been looking for.

This setup gives you serious turning power—about 50% more force than stock—so you can turn those oversized tires like they’re still factory size. Whether you're crawling through rocks or cruising down the road, you’ll keep that familiar CJ road feel with no oversteer or twitchiness.

This is a complete kit, built around our Big Bore XD-CJ steering gear that’s modified for hydraulic assist. It’s got everything you need to get the job done right the first time, including our remote reservoir pump kit, high-pressure hoses, and a 1.75" assist cylinder.

This is the same kit we run on our own rigs, and it’s built to handle the kind of off-road abuse that makes stock steering systems tap out.

Heads‑up for installers

If you’re wheeling in intermediate to advanced terrain, we recommend upgrading the pump with a -6 JIC Male Flow Control Valve and matching hose/fitting kit. It helps keep fluid moving efficiently to the gear and cylinder, especially under load.

Tech Tip: 

Positive caster helps your steering wheel return to center and improves straight-line stability. For best results with larger tires, we recommend 6–7 degrees of positive caster on your front axle. It’ll help keep your CJ tracking straight and feeling solid at speed.

What’s included

• Big Bore XD-CJ Cylinder Assist Steering Gear 
• Complete Pump and Remote Fluid Reservoir Kit 
• High-Pressure Hose Assembly 
• 1.75" ID × 6.0" Travel Assist Cylinder with Hose Kit 
• PSC 715 Power Steering Fluid

Use it with

• Jeep CJ (1972–1979) with factory power steering
• PSC Remote Reservoir
• PSC FHV-CE Steering Control Unit (optional upgrade)