• Community
    • Team 4 Wheel PartsJoin the team and keep up with Greg Adler
    • FacebookAccess exclusive off-road news and giveaways
    • TwitterStay posted on 4 Wheel Parts events
    • YouTubeSee product, installation, and event videos
    • Google+Get the inside scoop on the latest off-roading trends
    • InstagramCheck out exclusive photos
    • Sign Up for Email Offers

Truck and Jeep Parts Home » Brakes & Steering » Steering Box » Big Bore HD Steering Box

Big Bore HD Steering Box

PSC Steering | Part Number: PSMPSC-SG685
Help us ensure this part fits your vehicle Check Fitment
Part Number: PSMPSC-SG685
  • Technical Details

    • Fits 2007 to 2017 JK Wrangler, Rubicon and Unlimited
    • 2 and 4-door models
    • Direct bolt in application
    • High torque
    • 80mm piston
    • Does not require cylindar assist
    • Added material to case for extra durability
    • 42mm sector shaft
    • 35% increase in strength

With the Jeep JK steering gears being pushed to the point of failure due to the increased torque loads of larger tire sizes, larger axles and locking differentials, the time has come for a larger steering gear. Well it is here! PSC Motorsports went back to the drawing board and re-engineered a new direct bolt-in high torque/heavy-duty replacement steering gear for all Jeep JK applications. The new JK XD steering gear replaces the 70mm stock piston with a larger 80mm piston, giving it more turning torque to turn up to 37” tall tires without the need of cylinder assist. More material was added to the case in all mounting for sturdier base. Sector shaft diameter is increased from 35mm to 42mm for a 35 percent increase in strength. The JK-HD kit comes with a new factory drop pitman arm, nut and washer to match the newer larger sector shaft. Anyone with a Jeep JK running bigger than factory tires will want this bolt on upgrade on their must have list.

Direct Fit

Customer Reviews

  • Now Hiring

    4 Wheel Parts is Hiring

    To see all of our current job openings

    Apply Now

  • Email Offers

    Sign up now to receive our latest promotions and exclusive offers.

  • Store Locator

    4 Wheel Parts Store Locator

    91 Stores in North America.
    Locate a store near you.

    Store Locator