JL/JLU Rear Inner Fender Liner / Highline Kit

When we designed our Highline rear flares, we slimmed the flare base to open up the wheel well for builds running tires 40 inches and larger. That created another problem: trimming the body up to the new flare base left a gap above our standard Rear Inner Fender Liner. The flare and body opening had changed, but the liner still followed the original opening. We didn’t like leaving that gap, so we built a liner specifically for the Highline setup.

The Highline rear liner brings its upper lip farther up inside the wheel well, keeping it tucked behind the flare base after the body is trimmed. It finishes the opening the way we intended, rather than leaving the standard liner short of the flare. The flare, body trimming, and liner work together to achieve ultimate clearance.

Getting the liner higher in the wheel well means dealing with the sheet metal that occupies that space. Trimming the body or reshaping the sheet metal with an air hammer allows the upper lip to reach its intended position behind the Highline flare base. Without those modifications, the liner can’t sit where it needs to.

This setup is intended for builds running tires 40 inches and larger that need the additional opening available with our Highline rear flares. Our standard rear flares have a larger base plate that limits how far the opening can be cut. If you’re running Highline flares but aren’t planning to trim the body, you can still use our standard Rear Inner Fender Liners. Choose the liner around the body opening you intend to run—not just the name.

Installation also requires our Vapor Canister Relocation Bracket. If you haven’t already purchased it, select the full kit that includes the bracket.

The Highline shape changes where the liner fits, not how we build it. Our signature TIG-welded construction starts with .090-inch aluminum, formed and welded into the liner’s main body. Instead of relying on rows of bolts to join those sections, we TIG weld them together. The result is a finished assembly with the fabrication on display—not a collection of panels you have to bolt together.

That same .090-inch aluminum also gives you a solid surface for mounting accessories such as shock reservoirs and rock lights. You can lay out those additions around your suspension and the space available inside the wheel well, choosing placement and mounting hardware to suit your build. The material serves both purposes: forming the liner itself and providing a useful foundation for the accessories you add.