BIG BORE XD Adventure Cylinder Assist Steering Kit for 2018-2023 Jeep Wrangler JL 3.6L Non-eTorque PSC Performance Steering Components SK501

This kit is the perfect solution for the daily driver JL that also likes to play off-the-road. The PSC SK501 BIG BORE XD Adventure Steering Kit is complete with everything needed for a successful installation, transforming your 2018-2023 Jeep Wrangler JL's steering performance.

The Adventure Kit eliminates the common issues plaguing stock JL steering systems while providing a solid foundation for future upgrades. Ready to add a full cylinder assist? The BIG BORE XD gearbox comes with cylinder assist ports already installed, allowing you to upgrade later without replacing the gearbox.

Applications:
- 2018-2023 Jeep Wrangler JL (2-Door)
- 2018-2023 Jeep Wrangler JLU (4-Door Unlimited)
- 3.6L Pentastar Engine
- Non-eTorque Models Only

Kit Includes:
Box 1:
- (SG689R) 18-2023 Jeep JL/JLU BIG BORE XD Cylinder Assist™ Steering Gearbox (Not Sold Separately)

Box 2:
- (PK36JP2) 2018-2020 Jeep Wrangler JL/JLU 3.6L Non E-Torque XD Pump Kit

Box 3:
- Jeep JL Reservoir Kit with Fluid Anti-Splash Valve for Remote Reservoir
- Master Hose Assembly Kit
- Fluid Cooler Kit
- SWEPCO 715 Power Steering Fluid

Key Features:
- Eliminates excessive on-center steering wheel "play"
- Eliminates electro-hydraulic pump overheating issues
- Increased torque output turns up to 35" tire sizes without cylinder assist
- Improved turning capability when locking differentials are engaged
- Upgrades the 70mm stock piston to 80mm for more torque
- Enlarges sector shaft diameter from 42mm to 45mm for increased strength
- Comes with NEW OE-spec pitman arm and nut to fit larger 45mm sector shaft
- Reliable mechanical, belt-driven pump replaces the stock electric pump
- All required hoses, fittings, cooler, anti-splash valve & SWEPCO power steering fluid included
- BIG BORE XD gearbox includes cylinder assist ports for future upgrades
- Ultimate steering stabilizer for daily driving and weekend adventures

BIG BORE XD Technology:
The heart of this kit is the PSC BIG BORE XD Steering Gearbox (SG689R), which features:
- 80mm piston (vs. 70mm stock) for 14% more hydraulic assist
- 45mm sector shaft (vs. 42mm stock) for 7% more strength
- Pre-installed 6AN ports for easy cylinder assist addition later
- Precision-engineered for perfect fit in JL chassis

Mechanical Pump Conversion:
Say goodbye to overheating electric power steering pump failures. The PK36JP2 High Flow Mechanical Pump Conversion Kit includes:
- Belt-driven mechanical pump for reliable, consistent performance
- Remote reservoir with anti-splash valve
- Complete hose and fitting kit
- Integrated fluid cooler to prevent overheating
- No more electric pump failures on hot days or during heavy wheeling

Why Choose the Adventure Kit?
This kit is specifically designed for JL owners who:
- Daily drive their Jeep but also enjoy off-road adventures
- Want to eliminate the unreliable electric power steering pump
- Run tires up to 35" without needing cylinder assist
- Want the option to add cylinder assist in the future
- Experience steering issues when using locking differentials
- Are tired of on-center steering play and wandering

Future Upgrade Path:
The BIG BORE XD gearbox comes equipped with cylinder assist ports, making future upgrades simple. When you're ready to add a hydraulic cylinder assist for even larger tires or more extreme wheeling, you won't need to replace the gearbox—just add:
- PSC Cylinder Assist Axle Kit (various stroke lengths available)
- Tie Rod Clamp (size depends on your axle setup)

IMPORTANT INSTALLATION NOTES:
- Requires Tazer JL or Tazer JL MINI programmer to override OEM electro-hydraulic pump functions (not included)
- Use HWK-689-PP hardware kit when installing a Synergy MFG Track Bar and Sector Shaft Brace with this product
- Using SHORTER OEM or standard supplied bolts with a Synergy track bar brace could result in steering gearbox case failure
- The larger size of the BIG BORE XD gearbox may prohibit the use of some aftermarket track bars

Recommended Installation Tools:
- 46mm Pitman Arm Nut Socket
- Standard hand tools
- Professional installation recommended

Compatibility Notes:
- For 3.6L eTorque models, see PSC's EHPS Boost Kit options
- For 2.0L eTorque models, see PSC's EHPS-specific kits
- For 4XE models, see PSC's 4XE-specific steering solutions

ALL PICTURES SHOWN ARE FOR ILLUSTRATION PURPOSE ONLY. ACTUAL KIT CONTENTS MAY VARY DUE TO PRODUCT DESIGN CHANGES AND/OR ENHANCEMENTS.

Don't see what you need or need help making a decision on which product is right for your project? Contact PSC Support.

PSC Performance Steering Components is the industry leader in high-performance steering solutions for Jeep Wrangler and off-road applications. Trusted by daily drivers, weekend warriors, and professional racers worldwide.