Not sure what you need?
If you’re running lockers, big axles, and 40s on your JK, your factory steering isn’t going to cut it. PSC’s BIG BORE XD Cylinder Assist Steering Kit is the ultimate upgrade for 2007–2011 Jeep Wrangler JK/JKU 3.8L owners who demand serious steering performance. Built for Jeeps with locking differentials, aftermarket axles, and tires up to 44", this kit delivers the torque and control you need on the toughest trails.
Every kit includes our BIG BORE XD Steering Gear, a high-performance pump kit with remote reservoir, a Cylinder Assist kit, and all the hardware you need for a clean install. Say goodbye to steering play, pump overheating, and white-knuckle turns when your lockers are engaged.
Kit Includes:
- SG688R Big Bore XD steering gear
- Complete pump kit
- Cylinder assist kit (cylinder assist, bracket, hose kit, rod ends, tie rod clamp)
- Fluid cooler and PSC 715 power steering fluid
Notes:
** For supercharged vehicles, please contact us for a custom pump kit
*** Use HWK-688-PP hardware kit when installing with a Synergy MFG Track Bar and Sector Shaft Brace kit
**** Some aftermarket track bars may not clear the Big Bore XD Gear- be sure to check prior to installation
Since 2011, we’ve lived off-road, bringing know-how to every build.
From our MA shop to your driveway, we deliver trusted gear anywhere.
Handpicked from trusted brands for durability, performance, and style.
5-star service, and a team that treats your rig like their own.
