Episode 6 - Rock Hard 4x4 Harness Bars

Since we had removed the OEM seats and upgraded to suspension seats, it was decided that we are going to upgrade the restraint system as well. So, gone are the days of the simple shoulder and lap belt, we now have an upgraded 5 point restraint system that will keep all occupants snug in their seats at all times. In order to use the shoulder straps, we installed harness bars from Rock Hard 4x4, which had given us a secure mount location for both the front and rear bucket seat restraints.


In addition to the ability to mount the shoulder straps for the 5 point harness, we now get a firmed up cab with the 1 3/4" .120 wall steel tube harness bars spanning both the B-pillar and OEM roll cage in the rear of the Jeep.

A few key items on the harness bars as listed on the Rock Hard 4x4 website:

  • Height Adjustable
  • Welded Harness Loops Included
  • 100% Made in USA
  • Lifetime Warranty

Installation Notes:

     Products Used

The following are the Rock Hard 4x4 items that were used for this installation



The Rock Hard 4X4 Harness Bars ship bare steel. You will need to get them painted or powder coated to prevent the steel from rusting. The harness bars come with all of the hardware that is needed for proper installation, including the correct size bit to retap holes in collar.


     Tools/Items Used

In addition to having some great friends to help you out, you'll also need the following tools and materials.

  • Punch (marker for hole to drill)
  • Power Drill
  • Step Drill bit or 3/32" drill bit for pilot hole
  • 1/4" Drill bit for final hole (Front Harness Bar to B-Pillar)
  • T50 Torx Bit (if you plan on removing the OEM seat belts)
  • 5/32" Hex Bit for Front Harness Bar Bolts
  • 1/4" Hex Bit for Rear Harness Bar Bolts



Having fellow Jeep owners along to help you out is invaluable! Not only will it cut down in the total amount of time required to do the work, great conversations can be had and stories while out on the trail about the install are always great. As you can see in the video you need to be able to work simultaneously on both sides of the Jeep. Unless your name is "Stretch Armstrong", you are going to need some assistance in getting both of the harness bars installed. When installing the front harness bar, there is no set place for installation, however the bar will only allow you to go so high up into the B-Pillar. According to the instructions provided by Rock Hard 4x4, "Place bar between door posts, as you slide the bar down into position it will get tight. This is the place the bar is installed". We found that we had to maneuver the bar around a few times in order to get the proper fit. Just flex the muscles a bit and you'll get it set correctly. Before you drill any holes, make sure that the bar is level and is in proper position for your shoulder straps to mount to. The rear harness bar was a simple install and may or may not require cutting your OEM roll bar padding, that will depend on placement of the harness bar onto the OEM roll bar. In this install I had removed the plastic covers that enclose the OEM rear seat belts. This was fine as I had removed them from the Jeep anyway.


Additional information on the Rock Hard 4x4 product can be found on their website


If there are any questions, please feel free to post them up in our Forum

NOTE: The information contained on this site is for reference purposes only. No warranty, support or guarantee is assumed or implied by the San Diego Jeep Club.  Think first! Always be smart and be safe when working on your rig!

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