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RedRock 4x4 Inner Fender Liner Kit - 4-Piece (07-18 Jeep Wrangler JK)

Item J104233
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Market Price $400.99 You Save 11% ($46.00)
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$354.99 (kit)

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      Review & Installation Video

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Creates a Clean, Finished Look
      • Crafted from High Density Polyethylene (HDPE)
      • Bolt-On Installation
      • Includes Hardware
      • For RedRock 4x4's Flat Fender Flare Kit
      • Fits 2007-2018 Jeep Wrangler JK Models


      Cleaner Appearance. Upgrading to flat fenders doesn't mean you'll have to sacrifice the clean look of your stock flare liners. This RedRock 4x4 Inner Fender Liner Kit is designed to transform your the look of your Wrangler after upgrading with the RedRock 4x4 Flat Fender Flares by covering up your JK's newly exposed fender walls.  This Fender Liner Kit will help keep mud, dirt and debris off your inner fender paint and help protect your investment by preventing surface damage which could lead to rust. Its perfect for off road and street Wranglers alike, giving both a clean and finished appearance.

      Durable Construction. This Fender Liner Kit is manufactured from durable HDPE (High Density Polyethylene) for extreme strength. The liners are formed from a custom mold for an exact fit and are already pre-drilled and punched for an easy installation without modification.

      Application. The RedRock 4x4 Inner Fender Liner Kit is designed to fit all 2007-2018 Jeep Wrangler JK and JK Unlimited models. For use with RedRock 4x4's Flat Fender Flares, item J103867.

      RedRock 4x4

      Fitment: 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Details

      MPN# J104233

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (18)

      Write a Review

      Ratings Summary

      3.4 out of 5 overall rating from 18 customers

      Installation Time: Afternoon

      • December 25, 2019

        4 2012 Wrangler - Akhkharu Installation Time: Less than 1 Hour

        Alright for what they are.

        Decent liners. The only drawback is that the holes don't match up 100

        Helpful (1)
      • August 08, 2019

        4 2012 Wrangler - Scott Installation Time: Less than 1 Hour

        Be Careful!!

        The kit itself was fairly easy to install. It did NOT come with instructions! After figuring it out. Not too bad. I had to do a bit of drilling to make it fit right.

        Helpful (1)
      • July 26, 2018

        2 2018 Rubicon - EricF Installation Time: Afternoon


        The design on the light mount is cheep at best, I bought the inner liners as well so I got 4 clips, 2 broke, the 2 that worked wont last. You do break clips removing the factory fenders, so relying on the fit of the new ones is paramount, my rear inner liners didn't come close to fitting the front had to be modified, defiantly not worth over 600.00 bucks. Overall very disappointing!

        Helpful (7)
      • June 05, 2018

        3 2008 Wrangler - MartinL Installation Time: Afternoon

        A Few Issues

        Got the liners and fenders. As mentioned by others, rear liners did not fit well and drilling was required. Front liners and fenders were each missing a hole and require drilling. Front liners are not like in photos and instructions. Mount for side running lights is missing. Luckily there is a mount with the fenders. The missing mont (hole shown in photos and video) for the liners required a return and the same configuration was sent the second time. Only three fender flares were delivered the first time requiring another return. Recommend an additional hole and bolt be added at frontmost position on front fender flares.

        Helpful (7)
      • June 03, 2018

        5 2008 Wrangler - Burroman Installation Time: Afternoon

        Easy to install

        There are probably heavier duty fenders but I like the fact they flex. I’m hard on my Jeep and like the bend when absolutely necessary.

        Helpful (7)
      • May 23, 2018

        3 2008 Rubicon - DeanC Installation Time: Afternoon

        Liners don't fit as well as the fender flares

        I ordered both the liners and the fender flares at the same time. Although the flares pretty much matched perfectly, I had a heck of a time getting the liners to fit - especially on the rear of the Jeep. The holes did not line up - some were off as much as 3/8 inch, and I ended up trimming excess material from the edge of the liners to get them to fit into the well properly. I really do like the looks, but the installation didn't go well until I reamed out some of the mounting holes and got the excess material trimmed off.

        Helpful (7)
      • March 06, 2018

        1 2016 Wrangler - Lukas1015


        I was looking forward to having actual fender liners on my 2016 JKU. Liners were very badly trimmed and holes didn’t aligned at all. Worst part is I call to send them back to Extreme Terrain I have to pay $150 for shipping.

        Helpful (7)
      • January 01, 2018

        5 2011 Rubicon - Gregory Installation Time: Afternoon

        Clean look less noise

        I run a fairly aggressive Tire and going with the plastic inner panels and not the steel inner panels was one of my better moves the rocks hitting the inner panels driving on dirt and gravel roads are not near as noisy no rattles from the steel panels

        Helpful (8)
      • November 10, 2017

        3 2014 Wrangler - PeterStassi Installation Time: Afternoon

        Not bad

        They look good but installation was a bit tricky because the rear liners didn't line up nicely with all the pre drilled holes where they belong. Had to muscle it in. Directions are vague but you can figure it out.

        Helpful (9)
      • September 29, 2017

        1 2008 Wrangler - JW

        Hard time

        Hard time getting the holes to line up with the flares. Very frustrating.

        Helpful (10)

      Questions & Answers (5 answers)

      5 Top Rated Questions

      Will these cover the gap from a 1 inch body lift?

      • They would not cover the gap from a 1 inch body lift since these are meant to also fit a Wrangler without a body lift.

      Helpful (0)

      I have the red rock flat fender flares installed already. Does this inner fender kit come with the plastic clips you break off to install the inner fender kit for the rear fenders?

      • These kit will come with the installation hardware.

      Helpful (0)

      Hello! Does this fit with Barricade HD Flat fender flares?

      • The RedRock 4x4 Inner Fender Liner Kit is intended for use with the RedRock 4x4 Fender Flare Kit only.

      Helpful (0)

      Will this product work in conjunction with Crawler Conceptz steel fender flares?

      • Thank you for your question! Yes, these would be compatible with the Crawler Conceptz steel fender flares.

      Helpful (0)

      Can these be used in conjunction with the Smittybilt XRC fender flares? Will they properly cover the wheel wells?

      • The RedRock 4x4 Inner Fender Liner Kit is designed specifically to fit the RedRock 4x4 Flat Fender Flare Kit, and has not been tested or designed to fit other fender flares.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Front Left Side Fender Liner
      • (1) Front Right Side Fender Liner
      • (1) Rear Left Side Fender Liner
      • (1) Rear Right Side Fender Liner
      • (2) Side Marker Retainers
      • Hardware

      Tech Specs

      Will It Fit My Wrangler

      • JK Rubicon 2 Door - 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
      • JK Rubicon 4 Door - 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
      • JK Wrangler 2 Door - 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
      • JK Wrangler 4 Door - 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18

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