XJ Critical Path Long Arm Upgrade (adjustable)

XJ Critical Path Long Arm Upgrade (adjustable)
    Code: 10488
    Weight: 88.00 pounds
    Rating: Not Yet Rated | Write the First Review
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    *ADJUSTABLE ONLY! Fixed length was discontinued Jan. 2019.

    We use an exclusive, non-binding, 3 link setup that has a pair of front long arms that will flex more than you thought possible. You WILL NOT bend these long arms as they are made from 5/16" wall DOM tubing. The bushings at the unibody are greaseable flex joints that pivot to give as much suspension travel as your shocks will allow. We combine that with factory style rubber bushings at the axle for superior road noise and vibration dampening. As always, this kit is 100% bolt on! NO WELDING and only minor drilling is required for installation. *No adjustment is necessary in any part except for our unique caster adjustment bracket that allows 7.5° of adjustability; plenty for any lift height from 4-8"!!

    Why Fixed Length?
    1. Strength - With 2" x 5/16" wall DOM straight into the bushing tube, there are NO weak points on these control arms. The Iron Y is gusseted with 1/4" laser cut steel gusset for additional support. No threaded rod to rust, bend, mangle on rocks, or worse yet wear out and clunk!
    2. Control Arm/Axle Position - We have designed these arms to be the ideal length for your XJ for any lift between 4" and 8". Imagine you add our long arm upgrade to your 6" lift kit. Now 6 months later you want to go to 8" of lift. The axle will only be pulled back less than 1/4"! Remember, the arc that our ideal length long arm travels is always the same, meaning your tire will center perfectly in the wheel well on compression no matter what height lift you are running.
    3. Easiest Install - You can't get it wrong. You don't have to match your control arms or worry about setting the right length because that is done for you.
    4. SAVES YOU MONEY!!! - It costs us less to build so the savings get passed to you.
      Kit Includes:
    • 1 Passenger side lower control arm.
    • 1 Iron-Y radius arm that connects to the upper and lower axle mounts.
    • 3 piece high clearance, steel subframe assembly with built in optional transfer case drop
    • All required hardware.
    • Detailed Installation Instructions

     Front long arm system will not fit the 1999 XJ with the 4 cylinder engine and 5 speed transmission.   2000 and 2001 models with automatic transmissions will require old style transmission mount such as 2625

    Still want adjustable length? Yes, they are available here. Click the checkbox above to add thatoption to your order.

    HERE'S A QUOTE FROM AN EMAIL WE RECEIVED REGARDING THIS KIT, "I have gotten so many compliments on how much this kit flexes, I have already had numerous flex competitions with friends with rubicon express and their flex does not even compare. Thanks again!" Q.M. Murieta,

    Estimated Installation Time: 2-4hrs

    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.


    Kit Types
    Short arm kits:
    What is a short arm kit? A short arm kit is a suspension system that typically utilizes the factory mounting points on the axles and the chassis for your control arms. These types of kits can use OEM control arms, heavy duty fixed length arms, heavy duty adjustable arms, OR any combination of these options. Short arm kits are the easiest system to install and upgrade, and are very versatile. These systems are best used in 0-4.5” lift range, depending on the vehicle. From daily driving to overlanding, to light rock crawling, these kits transform your Jeep into a swiss army knife. With a low purchase price, and fantastic performance gains over stock, these are a great bang for the buck!
    • Most affordable option
    • Huge improvement over stock suspension
    • Clearance to fit bigger tires and drive over larger obstacles
    • Has all required parts with nothing you don’t need
    • Great “foundation” to build on!! Upgrade when it fits your build timeline/budget.
    • Kit utilizes short arms (not a long arm kit)
    • Simplest installation, using basic hand tools. Minor drilling may be required.
    • Contains all “Foundation” kit features PLUS:
    • Includes most common and value packed upgrades over the Foundation Series to remain budget friendly.
    • Easy to upgrade without purchasing duplicate parts.
    • Kit utilizes short arms (not a long arm kit)
    • Still a simple install, basic hand tools required. Minor drilling may be required.
    • Contains all “Benchmark” kit features PLUS:
    • Includes premium level features such as adjustable control arms, adjustable track bars, stainless steel braided brake hoses where applicable.
    • Highest performing short arm system
    • Kit utilizes short arms (not a long arm kit)
    • The best for mild lift height builds for all around versatility, adjustability, and durability.
    • Basic hand tools for installation. These kits usually contain several components with adjustments so we view this as a medium difficulty installation. Some minor drilling may be required.
    Long arm kits:
    What is a long arm kit? Long arm suspension systems use a chassis mounting system that allows a much longer control arm set to be installed. Why? This allows for a flatter operating angle for and more straight up and down axle movement through the suspension cycle. The benefits include an improved ride comfort than otherwise equally equipped short arm suspension, significantly reduced binding allows more articulation keeping your tires on the ground longer, meaning more traction without the use of traction aides (like limited slip or lockers). Long arm systems often have easier provisions for swapping in different axles. The ROCK-LINK kits are Iron Rock’s answer for a premium long arm system. These systems are the best choice for modern installers since the benefits are “next level” when compared to any short arm systems. These systems are best used in 3-8+” lift range, depending on the vehicle. The installation can vary from simple to difficult depending on the system or vehicle application.
    • Contains long arms in the front and short arms in the rear. This combines the premium performance benefits of a long arm system and the great value of short arms or leaf springs ;-)
    • Stronger than stock
    • Great for both high ground clearance builds as well as low center of gravity builds
    • Typically does not require exhaust modification.
    • Best for lifts above 3.5”, from daily driver to aggressive off-road driving style, including rock crawling!
    • Easy to upgrade by adding rear long arms at a later time. This allows you to build up to the ROCK-LINK PRO in stages as your budget allows.
    • Installation is usually longer than short arm kits due to the quantity of parts replaced/upgraded. Difficulty level is medium. Basic hand tools required. May require minor drilling/cutting.
    • Includes all ROCK-LINK features but upgrades from the short arms (or leaf springs) in the rear to a long travel, long arm system.
    • Great for any and ALL builds 3.5” and up. These kits EXCEL in ride comfort with also providing maximum off-road capability.
    • Typically requires exhaust modification. Iron Rock does have exhaust kits available for many models.
    • Installation difficulty is “hard.” Typically requires welding/cutting/drilling.

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