Steering gearboxes are a place of wear and tear on your pickup and this is especially true if you're spending more time off-roading than on.  Whether you are planning on upgrading or you just want to steer with confidence, PSC's BIG BORE XD is the steering gear built to take what the road throws at it. Engineered to handle the increased torque loads of performance and off-road vehicles, the PSC XD shaft is fully updated with a larger diameter sector shaft so you won't get oversteer but instead get a familiar feel of the road. Fix your steering and prepare for future PSC upgrades with the BIG BORE XD that gives you greater value and peace of mind over re-manufactured components. This version of BIG BORE XD comes with Cylinder Assist functionality so if you're planning on upgrading to a PSC Steering Assist Cylinder this is the one for you!