PSC SK231 Big Bore XD Cylinder Assist Kit, Jeep Wrangler YJ 4L (90-94), 8in Stroke

These kits are built for Jeep people who actually use their Jeeps. If you’ve got a YJ with a 4.0L and you're running lockers, big tires, or just hitting the trail hard, PSC’s Cylinder Assist Steering Kits are exactly what you need to keep control when things get gnarly.

PSC offers two versions—SK230 with a 6in stroke and SK231 with an 8in stroke—so you can match your setup and suspension travel. Both kits are trail-proven, bolt-on (with some welding for the ram mount), and built to handle real off-road abuse.

This listing is PSC part number SK231 (Axle Stroke: 8in).

Features

• Hydraulic assist makes steering easy—even with big tires and lockers
• Designed specifically for the YJ’s steering geometry and 4.0L engine
• Two stroke options to match your axle travel

Specifications

• Part Number: SK231
• Axle Stroke: 8in
• PSC Cylinder Assist Ram (6in or 8in stroke)
• PSC Steering Gear (YJ-specific)
• High-Pressure Hose Kit
• Ram Mounting Brackets
• PSC 715 Fluid

Installation Notes

• SK231 - 8in stroke
• You’ll need a high-performance power steering pump (PSC recommended)
• Ram mount may require welding depending on your axle
• Ideal for: YJ owners running 35in+ tires

Fitment

• Jeep Wrangler YJ 4.0L - 1990-1994

What’s Included

• Complete Cylinder Axle Kit (choose SK230 or SK231):
• SK230: Includes CAK061R-6: Cylinder Assist® Kit - Jeep Wrangler YJ 4.0L (1990-1994) - 6.0in Stroke
• SK231: Includes CAK061R-8: Cylinder Assist Axle Kit - Jeep Wrangler YJ (1987-1995) - Weld-On - 8.0in Stroke
• SG061R: BIG BORE XD Steering Gear - Jeep (1987-2002) - w/ Cylinder Assist Ports
• PK40JP1: XD Power Steering Pump Kit - Jeep Wrangler YJ 4.0L (1991-1994)