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/media/jks_jspec_149k_150k_151k_152k_jk_j_krawl_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/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/media/jks_2200_jeep_acos_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/jks_1655_jeep_j_flex_control_arms_card.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_1655_jeep_j_flex_control_arms_rotation_1.jpg
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Control Arms | Rear Upper | Wrangler TJ, LJ Grand Cherokee ZJ
    Upgrade your Jeep Wrangler TJ, LJ or Grand Cherokee ZJ performance and reliability with JKS J-Flex adjustable rear upper 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....
    $318.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/JKS1634_03.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/JKS1633_03.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/jks_1615_jeep_j_flex_control_arms_card.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_1615_jeep_j_flex_control_arms_rotation_1.jpg
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Control Arms | Front Upper | Wrangler JK
    Upgrade your JK Wrangler's off-road capability with JKS J-Flex adjustable front upper Control Arms. CNC-bent from DOM tubing for proper tire, frame and axle mount clearance, J-Flex control arms feature forged "flex" ends that are adjustable. The design increases reliability and allows you to...
    $318.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_2700_jeep_acos_pro_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/jks_1666_j_flex_control_arms_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/jks_1660_jeep_j_flex_control_arms_card.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_1660_jeep_j_flex_control_arms_rotation_1.jpg
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Control Arms | Rear Lower | Wrangler JK
    Upgrade your Jeep Wrangler JK'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 fully adjustable design allows you to fine-tune arm length. The ends are...
    $371.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_1650_jeep_j_flex_control_arms_card.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/JKS1639_03.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/JKS1636_03.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/jks_1625_j_flex_control_arms_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/jks_1610_jeep_j_flex_control_arms_card.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_1610_jeep_j_flex_control_arms_rotation_1.jpg
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Control Arms | Front Lower | Wrangler JK
    Upgrade your Jeep Wrangler JK's performance and reliability with JKS J-Flex adjustable front 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 1-1/4"-12 threads...
    $371.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/fox_98624154_01.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/jks_jspec_125k_126k_127k_128k_147k_148k_jl_j_krawl_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_shock_buyers_guide.jpg
    JKS Manufacturing
    JKS Manufacturing
    3.5" Lift Kit | J-Krawl | Wrangler JL 4-Door
    Build the ultimate adventure rig with a 3.5" lift kit J-Krawl suspension system. Fits 4-Door Jeep Wrangler JL. 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 shock...
    From $2,834.45
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_jspec5001k_jl_rear_coilover_conversion_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/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/media/jks_ogs651_xj_shackle_kit_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_ogs651_xj_shackle_kit_rotation_1.
    JKS Manufacturing
    JKS Manufacturing
    HD Leaf Spring Shackle | Cherokee XJ, Comanche MJ, Wagoneer SJ
    Lift your Jeep Cherokee XJ, MJ or Wagoneer SJ approximately +1" with JKS heavy duty leaf spring shackles. The boomerang-style design optimizes travel with full compression and extension while making room for larger tires. Greaseable Dura-Thane bushings provide smooth, quiet operation while preventing bind...
    $117.95

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