Hardcore Upgrades
Hardcore Upgrades

Hardcore Upgrades

Dominate gnarly obstacles and conquer extreme terrain with hardcore suspension from JKS. Engineered systems and upgrades deliver maximum articulation, durability, adjustability, and clearance.

The range of products includes turn-key suspension systems, custom-tuned JSPEC and FOX shocks and FOX coil-overs, HD track bars and control arms, sway bar disconnects, coil-over mounting kits, and a lot more. JKS engineers its "Go Anywhere" attitude into components that help you push your adventures to extreme levels.

Here are a few categories to get you started...

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  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_2211_jeep_acos_card.
    JKS Manufacturing
    JKS Manufacturing
    Front Adjustable Coil Spacer with Bump Stop | ACOS | Wrangler JL and Gladiator JT
    Fine tune your Jeep Wrangler JL or Gladiator ride height with JKS front adjustable coil spring spacers (ACOS). ACOS feature adjustable collars along with built in bump stops. Whether you added some extra weight, a larger set of tires or just did not quite...
    $297.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/JKS1633_03.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/JKS1633_02.jpg
    JKS Manufacturing
    JKS Manufacturing
    J-Link Adjustable Control Arms | Front Upper | Wrangler JK
    Enhance your Jeep's off-road prowess and reliability with JKS J-Link Adjustable Control Arms - now available with premium rubber bushings! Engineered specifically to reduce NVH characteristics (Noise, vibration, harshness), these factory style maintenance-free rubber bushings come pre-installed at both ends and will ensure a...
    $325.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_jspec_149k_150k_151k_152k_jk_j_krawl_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_shock_buyers_guide.jpg
    JKS Manufacturing
    JKS Manufacturing
    3.5" Lift Kit | J-Krawl | Wrangler JK 4-Door
    Build the ultimate adventure rig with a 3.5" lift kit J-Krawl suspension system. Fits 4-Door Jeep Wrangler JK. Designed for maximum articulation and adjustability, the complete suspension system includes dual rate coil springs, adjustable front track bar, rear track bar bracket and tuned FOX...
    From $2,727.50
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_2200_jeep_acos_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_2200_2210_2550_jeep_acos_rotation_1.
    JKS Manufacturing
    JKS Manufacturing
    Front Adjustable Coil Spacer | ACOS | Wrangler TJ & LJ, Cherokee XJ, Comanche MJ, Grand Cherokee ZJ
    Dial in ride height on your Jeep Wrangler TJ or LJ with JKS ACOS adjustable front coil spring spacers. The range of ride height adjustment is from 1-1/2" to 3-3/4" -- without taking apart suspension components. ACOS adjustable coil spring spacers compensate for uneven...
    $276.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_1666_j_flex_control_arms_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_1666_j_flex_control_arms_rotation_1.
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Control Arms | Rear Upper | Wrangler JL
    Your Jeep Wrangler JL  will benefit from JKS J-Flex adjustable rear upper control arms. They adjust for proper geometry while increasing driving comfort on the road. J-Flex arms are built from heavy duty 2" OD x .250-wall DOM tubing and CNC bent for additional...
    $334.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/JKS1634_03.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/JKS1634_01.jpg
    JKS Manufacturing
    JKS Manufacturing
    J-Link Adjustable Control Arms | Front Upper | Wrangler JL & Gladiator JT
    Enhance your Jeep™s off-road prowess and reliability with JKS J-Link Adjustable Control Arms - now available with premium rubber bushings! Engineered specifically to reduce NVH characteristics (Noise, vibration, harshness), these factory style maintenance-free rubber bushings come pre-installed at both ends and will ensure a...
    $349.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_jspec5001k_jl_rear_coilover_conversion_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_jspec5001k_jl_rear_coilover_conversion_rotation_1.
    JKS Manufacturing
    JKS Manufacturing
    Coilover Conversion Kit with FOX 2.5 DSC Shocks | Rear | Wrangler JL
    Pull out all of the stops by upgrading to JKS complete rear coilover conversion for the Jeep Wrangler JL. Designed to compliment the available front coilover conversion, this rear coilover conversion takes performance to a whole new level to maximize damping capability while allowing...
    $2,756.90
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_2710_jeep_acos_pro_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_2710_jeep_acos_pro_rotation_1.
    JKS Manufacturing
    JKS Manufacturing
    Front Adjustable Coil Spacer Pro | Wrangler JK
    Fine tune your JK Wrangler's ride height with JKS adjustable coil spacers (ACOS) with built in hydraulic bump stops. Adjusting ride height to compensate for some additional weight, or a new set of tires has never been easier thanks to our ACOS spring spacers....
    $901.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_2700_jeep_acos_pro_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_2700_jeep_acos_pro_rotation_1.
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Coil Spacer with Bump Stop | ACOS Pro | Wrangler TJ & LJ, Cherokee XJ, Comanche MJ, Grand Cherokee ZJ
    Fine tune your Jeeps off road suspension with the JKS adjustable coil spring spacers with built in hydraulic bump stops. Adjusting ride height to compensate for some additional weight, or a new set of tires has never been easier thanks to our ACOS spring...
    $938.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/JKS2571_01.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/JKS2571_02.jpg
    JKS Manufacturing
    JKS Manufacturing
    Rear Adjustable Coil Spacer| ACOS | Wrangler JL
    Fine tune your Jeep Wrangler JL ride height with JKS rear adjustable coil spring spacers (ACOS). ACOS feature adjustable collars along with built in bump stops. Whether you added some extra weight, a larger set of tires or just did not quite get enough...
    $397.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_1652_j_flex_control_arms_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_1652_j_flex_control_arms_rotation_1.
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Control Arms | Front Upper | Wrangler TJ / LJ Cherokee XJ / Comanche MJ / Grand Cherokee ZJ and WJ
    Enhance your Wrangler TJ, LJ, or Cherokee XJ Jeep with JKS J-Flex adjustable front upper Control Arms. CNC-bent from DOM tubing for proper tire, frame and axle mount clearance, these front upper control arms feature forged flex ends that are adjustable. The design increases...
    $265.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_1650_jeep_j_flex_control_arms_card.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_1650_jeep_j_flex_control_arms_rotation_1.jpg
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Control Arms | Lower | Wrangler TJ & LJ, Cherokee XJ
    Upgrade your Jeep TJ or LJ Wrangler's performance and reliability with JKS J-Flex adjustable rear lower control arms. CNC-bent from stout DOM tubing, the fully adjustable design allows you to fine-tune suspension geometry. The ends are also fully rebuildable and greaseable. With heavy duty...
    $371.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/JKS1639_03.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/JKS1639_04.jpg
    JKS Manufacturing
    JKS Manufacturing
    J-Link Adjustable Control Arms | Rear Upper | Wrangler JK & JL
    Enhance your Jeep's off-road prowess and reliability with JKS J-Link Adjustable Control Arms - now available with premium rubber bushings! Engineered specifically to reduce NVH characteristics (Noise, vibration, harshness), these factory style maintenance-free rubber bushings come pre-installed at both ends and will ensure a...
    $399.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/JKS1636_03.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/JKS1636_01.jpg
    JKS Manufacturing
    JKS Manufacturing
    J-Link Adjustable Control Arms | Rear Lower | Wrangler JK/JL
    Enhance your Jeep™s off-road prowess and reliability with JKS J-Link Adjustable Control Arms - now available with premium rubber bushings! Engineered specifically to reduce NVH characteristics (Noise, vibration, harshness), these factory style maintenance-free rubber bushings come pre-installed at both ends and will ensure a...
    $399.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_1625_j_flex_control_arms_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_1625_j_flex_control_arms_rotation_1.
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Control Arms | Front Lower | Wrangler JL and Gladiator JT
    Your Jeep Wrangler JL and Gladiator JT will benefit from JKS J-Flex adjustable front lower control arms. They adjust for proper geometry while increasing driving comfort on the road. J-Flex arms are built from heavy duty 2" OD x .250-wall DOM tubing and CNC...
    $371.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_1616_j_flex_control_arms_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_1616_j_flex_control_arms_rotation_1.
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Control Arms | Front Upper | Wrangler JL and Gladiator JT
    Enhance the ride quality and driving comfort of your Jeep Wrangler JL or Gladiator JT with JKS J-FLEX front upper adjustable control arms. They make it easy to dial in correct geometry and also provide added rigidity. Constructed of high strength DOM tubing, J-Flex...
    $302.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_1600_jeep_spring_retainer_card.
    JKS Manufacturing
    JKS Manufacturing
    Rear Coil Spring Retainer | Wrangler JK
    Rear Coil Spring Retainers are an important safety upgrade for your Jeep Wrangler JK. While longer shocks are likely to increase suspension travel, they can also allow coil springs to become unseated from their axle perches. If you're lucky, you will only be faced...
    $37.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/fox_98624154_01.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/fox_98624154_02.jpg
    JKS Manufacturing
    FOX
    FOX 2.5 IFP Front Shock - Single | Performance Series | 2-3.5" Lift | Jeep Wrangler JL and Gladiator JT
    Looking to increase your vehicle's off-road capability by running larger tires? The new Performance Series 2.5-inch Jeep shocks are designed to provide on-road comfort with performance-minded valving for a connected ride with less vehicle sway. How? Consistent and fade-resistant performance due to high-quality materials:...
    $259.00
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_jspec_129kfc_jl_j_max_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/jks_jspec_129kfc_jl_j_max_rotation_2.
    JKS Manufacturing
    JKS Manufacturing
    3.5" Lift Kit | J-Max | Wrangler JL
    J-Max pulls out all of the stops to offer a truly performance driven suspension package. At each corner are custom tuned FOX 2.5 factory race series coilovers with DSC adjustment. These coilovers offer race proven technology with a larger 2.5” diameter body, dual rate...
    From $7,754.50
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/JKS_JL_JSPEC155PS_1.jpg
    JKS Manufacturing
    JKS Manufacturing
    1.5" Lift Kit | FOX 2.5 IFP Shocks | J-Spec System | Jeep Wrangler JL
    If JKS designed the factory JL Wrangler suspension, this is how it would be done! Introducing the JKS 1.5" J-Spec Suspension System with specially tuned FOX 2.5 IFP Performance Series shocks. Whether your focus is improving on-road characteristics or suspension performance in the backcountry,...
    $1,699.90

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