Frame Mounted Rocker Guards for Jeep JKU 4 Door

Product Title

Frame Mounted Rocker Guards and Rock Sliders for Jeep Wrangler JKU 4 Door

Product Description

When you're working a Jeep JKU through rocks, ledges, and tight obstacles, the rocker panels are one of the first areas to take a hit. Body-mounted rocker guards can transfer those impacts into the sheet metal and body mounts. The Motobilt MB1158-JK Frame Mounted Rocker Guards are designed to transfer trail impacts directly into the frame instead of relying on the Jeep body to absorb the load.

Designed for the 2007–2018 Jeep Wrangler JKU 4-door Unlimited, these rock sliders weld directly to the frame rails. The frame mounts are fabricated from 3/16" laser-cut and CNC-formed steel plate, creating boxed mounting structures that distribute loads across a larger section of the frame. Compared to conventional tubing mounts and gussets, the formed brackets provide approximately four times the mounting surface area at the frame and three times the attachment surface area at the slider tubing.

The slider itself is constructed from 2" DOM steel tubing, with 3/16" laser-cut and formed steel end caps and center bracing. This combination provides a rigid barrier between the Jeep body and trail obstacles. The frame-mounted construction also allows the rock sliders to serve as Hi-Lift jack points when properly installed.

Motobilt builds these JKU rock sliders completely welded and ready for installation. They ship in bare steel and require welding to the frame, followed by painting or coating to protect the exposed metal.

For additional body protection, these sliders pair with the Motobilt Rocker Armor for Jeep JKU. Together, the frame-mounted sliders and body cladding help protect the lower body when navigating rocks, ledges, and other trail obstacles.

Important Information

• Fits 2007–2018 Jeep Wrangler JK Unlimited (JKU) 4-door

• Sold as a pair, driver and passenger side

• Welds directly to the Jeep frame rails

• Frame mounts constructed from 3/16" laser-cut and CNC-formed steel plate

• Main slider tubing constructed from 2" DOM steel

• 3/16" steel end caps and center bracing

• Boxed frame mounts distribute loads across a larger attachment area

• Can be used as Hi-Lift jack points when properly installed

• Compatible with factory fender flares

• Ships completely welded in bare steel

• Requires welding and protective finishing

• Rear long-arm suspension brackets mounted outside the frame rails may interfere with installation

• For those long-arm suspension applications, see MB1258 Frame Mounted Rocker Guards for Long Arm Suspensions

• Manufactured in Ozark, Alabama, USA

Product Specifications

Part Number: MB1158-JK

Vehicle Fitment: 2007–2018 Jeep Wrangler JK Unlimited (JKU) 4-door

Frame Mount Material: 3/16" steel plate

Slider Tubing: 2" DOM steel tubing

End Caps and Center Bracing: 3/16" laser-cut and formed steel plate

Mounting Method: Weld-on frame mounts

Finish: Bare steel

Quantity: Pair, driver and passenger side

Dimensions (H/W/D): 72" x 12" x 12"

Weight: 225 lbs

Manufactured: Made in the USA

Related Motobilt Products:

• JKU Rocker Armor

• MB1258 Frame Mounted Rocker Guards for Long Arm Suspensions

Installation Notes

The MB1158-JK rocker guards require welding directly to the frame rails. Installation should be performed by a qualified welder or fabricator familiar with vehicle frame construction.

Test fit both sliders and verify positioning before final welding. If the rock sliders will be powder coated before installation, identify and mask the weld areas or remove the coating where welding is required. After welding, clean and paint all exposed metal, including the welded attachment areas.

Always disconnect the vehicle battery cables before welding.

Check rear suspension link brackets and frame clearance before installation. Rear long-arm suspension systems with brackets positioned outside the frame rails may interfere with the rocker guard mounting brackets. For those configurations, use the MB1258 version designed for long-arm suspension clearance.

Installation Video: Watch the JKU Frame Mounted Rocker Guards Video

Frequently Asked Questions

What is the difference between frame-mounted and body-mounted rock sliders on a Jeep JKU?

Frame-mounted rock sliders attach directly to the vehicle frame rather than relying on body sheet metal or body mounts. The MB1158-JK uses welded, boxed steel mounting brackets to transfer trail impacts into the frame and distribute those loads across a larger attachment area.

Can I use the MB1158-JK rock sliders as Hi-Lift jack points?

Yes. The frame-mounted design allows the rock sliders to be used as Hi-Lift jack points when properly welded and installed. Always confirm that the jack is securely positioned and follow appropriate vehicle lifting precautions.

Will these rock sliders work with a long-arm suspension on my Jeep JKU?

Not all long-arm suspensions are compatible. Rear long-arm systems with mounting brackets located outside the frame rails may interfere with the MB1158-JK mounting brackets. Motobilt offers MB1258 for those applications.

Do the MB1158-JK rock sliders require welding?

Yes. These are weld-on frame-mounted rocker guards, not bolt-on body-mounted sliders. The brackets arrive fully welded to the slider assembly, but installation requires welding the mounts to the Jeep frame.

Do these JKU rock sliders come powder coated?

No. They ship in bare steel and require paint or another protective coating. Motobilt does not offer powder coating for this product. Any coating must be removed from the frame attachment weld areas before installation, and those areas must be protected after welding.