Powder Coating and Installing an XJ Cherokee Rear Bumper — Dirtbound Off-Road Highline Series

Unboxing, sandblasting, powder coating, and bolting on a Dirtbound Off-Road Highline rear bumper to match the front on the Core 4x4 shop XJ Cherokee.

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Powder Coating and Installing an XJ Cherokee Rear Bumper

The Core 4x4 shop XJ Cherokee already has an orange Dirtbound Off-Road front bumper, and now it is time for the rear to match. In this build video, Spence and Marissa unbox the Dirtbound Highline Series rear bumper, walk it through in-house sandblasting and powder coating, then cut, bracket, and bolt the finished bumper onto the Jeep. No welding required — just some careful cuts on the frame rail and a slotted bracket system that makes alignment painless.

Fitment: Jeep Cherokee XJ 1984–2001

What Is in the Box

Spence and Marissa from Core 4x4 standing in front of the shop XJ Cherokee with the boxed Dirtbound rear bumper

The Dirtbound Off-Road Highline Series rear bumper for the XJ Cherokee arrives in one box. Here is what you get:

Highline rear bumper body — low-profile steel construction that wraps tight to the body lines
Receiver hitch — built into the bumper for towing and accessories
Half-inch plate D-ring mounts — welded into each side for recovery points
Lighting cutouts — pre-cut openings on the rear face for flush-mount LED reverse or auxiliary lights
Frame rail brackets — designed to slide inside the frame rail for lateral support and left-to-right adjustability
Mounting hardware — all bolts and fasteners included

First impressions: this is a clean, low-profile bumper that follows the same design language as the Highline front bumper already on the XJ. No excessive bulk, no unnecessary wing tips — just a solid rear bumper that tucks in close.

Spence examining the raw steel Dirtbound Highline rear bumper and brackets on the shop table with the XJ Cherokee in the background

Sandblasting and Powder Coating

Before the bumper goes anywhere near the Jeep, it needs a finish. The plan is to match the orange powder coat on the front bumper. Core 4x4 does all powder coating in-house, so the process is:

Sandblast everything — bumper body and both frame brackets get a full media blast to etch the surface and remove any mill scale or oils
Primer coat — base layer for adhesion and corrosion protection
Top coat — orange powder applied with an electrostatic gun, then cured in the oven

The result is a finish that is significantly more durable than spray paint or rattle can. Powder coat resists chipping, scratching, and UV fading — important for a bumper that is going to take hits on the trail and sit in the sun.

Spence inspecting the uncoated Dirtbound Highline bumper and bracket hardware laid out on the table

Applying orange powder coat top coat to the Dirtbound rear bumper bracket in the Core 4x4 powder coating booth

Prep Work: Removing Old Bumper Brackets

With the fresh powder coat cured, it is time to prep the XJ. The old bumper was already removed in a previous episode, but the factory bumper mounts are still bolted to the frame. Those have to come off before the new brackets can go in.

Rear of the XJ Cherokee with old bumper removed, showing the bare frame rail and old bracket mounts being taken off

The driver's side came off without much trouble. The passenger side was a different story — there is a nut rail inside the frame that serves double duty as the mounting point for the exhaust hanger and gas tank heat shield. That nut rail had to come out to make room for the new bracket, but it also needs to go back in afterward to re-mount the exhaust shield.

Penetrating fluid tip: Soak any seized bolts well before you start. Spence hit the passenger-side nut rail bolts with penetrating fluid and let it work while cutting the driver's side. By the time he got back, the bolts came out cleanly.

Cutting the Frame Rail for the Brackets

This is the only part of the install that involves cutting. The Dirtbound brackets are designed to slide inside the frame rail, sitting flat on the inside bottom surface. To make that happen, you need to cut a rectangular opening on each side of the frame — roughly 3.5 inches tall by 2 inches wide, centered around the existing hole on the inside of the frame rail.

Close-up of the frame rail cutout showing the rectangular opening and bracket positioning inside the XJ Cherokee frame

How to Mark and Cut

Measure the bracket insert section — about 3.5 inches tall and just under 2 inches wide
Mark the frame — center your cut around the existing hole on the inside of the frame rail, adding just a little extra clearance beyond the bracket dimensions
Cut with a reciprocating saw or angle grinder — a Sawzall works, though Spence notes a cutting wheel on a grinder would have been faster and cleaner
Clean up the edges — file or grind any burrs so the bracket sits flat

The goal is a flat seating surface on the inside bottom of the frame rail. The cuts do not need to be pretty — they are hidden once the bracket is installed — but the bottom surface must be flat so the bracket sits flush and clamps properly.

On the driver's side, the aftermarket shackle bolt was long enough to interfere with the cut. On the passenger side, the nut rail for the exhaust shield had to be fished back into the frame after cutting. Every XJ will have slightly different obstacles depending on what has been modified, so expect to problem-solve as you go.

Installing the Frame Brackets

Once both sides are cut, the Dirtbound frame brackets slide into the frame rail openings and bolt through. What makes this bracket system stand out is the additional bolt pattern — instead of just two or four bumper bolts, you get three additional bolts along each frame rail that secure the bracket to the frame itself.

Orange powder-coated Dirtbound frame bracket being positioned inside the XJ Cherokee frame rail during installation

This spreads the load across a much larger area and makes the rear end significantly stiffer. If you have ever had a bumper that felt flimsy or flexed under a hi-lift jack or recovery pull, this bracket system solves that problem.

Installation Sequence

Slide both frame brackets into their frame rail openings and start all the frame bolts finger-tight
Offer up the bumper brackets — the bumper bracket bolts pass through both the bumper plate and the frame bracket, then thread into the body mount
Check alignment before tightening anything — make sure all holes line up on both sides before you start torquing
Torque all frame bracket bolts once alignment is confirmed

Mounting and Aligning the Bumper

With the frame brackets secured, the bumper itself goes on. The bracket system uses slotted holes, so you can shift the bumper left and right to center it perfectly with the body lines. On this XJ, it needed about a sixteenth of an inch of adjustment to line up.

The process: bolt the bumper on loosely, check alignment with the body, pop it off, shift the brackets slightly, re-mount and verify, then tighten everything down. It took one adjustment cycle to get it dialed.

Spence and Marissa showing the finished orange powder-coated Dirtbound Highline rear bumper installed on the XJ Cherokee

The Finished Result

The orange powder coat on the rear bumper matches the front bumper perfectly. The Highline design keeps the profile low and tight to the body, and Dirtbound added a detail on the corners that follows the body line for a clean, integrated look. With the D-ring mounts, receiver hitch, and lighting cutouts, this bumper is trail-ready out of the box.

Spence and Marissa both noted how well the bracket system firms up the rear end — it feels like a structural upgrade, not just a cosmetic one. That extra bolt pattern along the frame rail makes a real difference.

Tools Required

Reciprocating saw (Sawzall) or angle grinder with cutting wheel
Socket set and wrenches
Tape measure
Marker or paint pen for marking cuts
File or grinding disc for cleaning cut edges
Penetrating fluid (for seized factory bolts)
Wire or fish tape (for reinstalling the gas tank shield nut rail)

What Is Next for the XJ Build

With the front and rear bumpers done, the XJ Cherokee build series is approaching the finish line. The next video will cover wheels and tires along with the remaining odds and ends to get the Jeep trail-ready. After that — a trail run to see how everything performs.

Frequently Asked Questions

No. The install is entirely bolt-on. The only fabrication required is cutting a small rectangular opening on each side of the frame rail so the brackets can slide inside. No welding is needed — just a reciprocating saw or angle grinder and basic hand tools.

You need to cut a rectangular opening roughly 3.5 inches tall by 2 inches wide on each side of the frame rail. The cut is centered on an existing hole inside the frame. The brackets slide into these openings and bolt through. The cuts are hidden once the brackets are installed.

Powder coating requires an electrostatic spray gun and an oven large enough to fit the part. Core 4x4 does all powder coating in-house on their own equipment. If you do not have access to a powder coat setup, you can send the bumper to a local coater or use a high-quality spray paint or bedliner as an alternative, though powder coat is significantly more durable.

The bumper includes a built-in receiver hitch, half-inch plate D-ring mounts on both sides for recovery, and pre-cut openings for flush-mount LED lights. The bracket system uses slotted holes for left-to-right adjustment and adds three additional bolts per side along the frame rail for increased strength.

Standard bumper mounts typically use two to four bolts that only attach to the frame end. The Dirtbound system adds three extra bolts per side that run along the length of the frame rail, distributing load across a much larger area. This makes the rear end significantly stiffer and better able to handle recovery pulls, hi-lift jack use, and trail impacts.