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CODE: 15917 JL 4" Rock-Link Lift Kit


JL 4" Rock-Link Lift Kit
Purchase JL 4" Rock-Link Lift Kit
  • CODE: 15917 JL 4" Rock-Link Lift Kit

  • Kit Loading


  • Kit Products

    Choose Your Front Springs *

      Choose Your Shocks *

        Choose Your Front Sway Bar Links *

          Choose Your JL Rear Upper Control Arms *

            Choose Your JL Rear Lower Control Arms *

              Choose Your Front Track Bar *

                Choose Your Rear Track Bar *




                Born from the long lineage of the IRO long arm tradition. Look no further for the first, front-only, long arm lift kit for the JL Wrangler, the Rock-Link 4" lift kit.

                  Experience your Jeep refined. It's a Jeep, but that doesn't mean it has to ride like a lumber wagon. The Rock-Link delivers an instant seat of the pants improvement in ride quality. But that's not all! Out on the trail, the improvement in ride quality translates to a more enjoyable off road experience. The longer arms in this system link your axle to the frame at a much lower operating angle than short arms at the same lift height. By decreasing that angle and increasing the length of the arms, the impact of the terrain is more easily absorbed by the suspension. These improvements over short arms greatly reduce the transmission of shock loads though the frame causing discomfort in the driver's seat, and reduces accelerated wear and stress on other suspension components. Longer arms allow for huge articulation over larger obstacles while keeping the axle centered in the fender openings. This articulation keeps your tires on terra firma, which translates into more traction. When comparing an otherwise equally equipped vehicle that has short arms, the Rock-Link equipped one will take you farther.

                    This kit is not just for rock crawlers! Maybe you aren't going to tackle Chocolate Thunder or Pritchett Canyon, but you are going to crush the REI parking lot, or turn every head while pulling up to your kid's campout. This Rock-Link lift kit delivers a true ride quality improvement for your daily driver that you can be proud of. Are you tired of your JL tracking wildly down the highway? The built in adjustments will give you everything you need to dial it in to perfection. Even stock JL are setup with minimal caster from the factory, so get your alignment right once and for all with the Rock-Link.

                    At IRO, we have been perfecting long arm systems since 2004, making them even better with each new product release. We have learned that subtle changes to the geometry will make significant improvements to your driving experience. We have applied all these important refinements to the JL platform. We learned that the biggest improvement in ride quality and off road performance comes with a FRONT long arm system. When looking at what this Rock-Link offers versus the cost, we challenge you to find a suspension system that will take your JL Beyond Boundaries at a price that is even close.

                      ROCK-LINK Benefits
                    • Improves ride quality
                    • Improves off road capability
                    • Increases ground clearance
                    • Wheelbase stretch ability
                    • NO exhaust modification
                    • Reduces stress on suspension components and the Jeep in it's entirety, including the passengers
                    • Passenger upper control arm removeable for increased 3-link performance

                      Kit Features
                    • Lower arms are 2"x5/16" wall D.O.M. - Thickest on the market
                    • All 1/4" steel bracketry - CNC laser cut and formed
                    • Huge 1.25" thread adjusting male ends with 3" of useable adjustment, that's far more than any competitor.
                    • No jam nuts
                    • Combination of flex joints and rubber bushings in control arms for flex and comfort
                    • Fully adjustable caster/pinion angles
                    • Bolt in design
                    • Powder coated black
                    • Made in the USA!
                    • Lifetime Warranty

                      Kit Includes
                      • Front 4-Link long arms
                        • Front and rear 4" multi-rate lift coil springs
                        • Shock absorbers
                        • Front adjustable bumpstop extensions
                        • Heavy Duty front adjustable track bar
                          • Extended length HD rear sway bar links
                            • All required hardware 
                              • Installation Instructions


                                        Product Fitment Notes
                                      • Fits 3.6 V6 and 2.0 4 Cyl, and EcoDiesel Unlimited models. The 2.0 requires coolant hose extension.
                                      • Requires removal of factory control arm mounts in the front
                                      • Requires drilling
                                      • OEM wheels will require 1.5" or thicker wheel spacers.
                                      • Does not fit 2 door models unless the gas tank is relocated









                                      Recommended tire size: 35"x12.50" – or metric equivalent

                                      Recommended wheel backspacing: 4.5-6"
                                      TRIMMING MAY BE REQUIRED
                                      Larger tire sizes possible with bumper/fender trimming and/or extended bump stops.

                                      Estimated Installation Time: 10-12hrs

                                      Difficulty Level: 3


                                      Difficulty Legend

                                      1 - Kit includes basic components.

                                      2 - Kit includes little to no adjustable components.

                                      3 - Kit includes many adjustable components; may require drilling/cutting.

                                      4 - Kit includes many adjustable components; requires welding; may require drilling/cutting.


                                      NOTE - Labor Time and Difficulty Level assumes vehicle and/or hardware is in good condition.





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