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_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 SKU: JKS2700
    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/JKS2571_01.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/JKS2571_02.jpg
    JKS Manufacturing
    JKS Manufacturing
    Rear Adjustable Coil Spacer| ACOS | Wrangler JL SKU: JKS2571
    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/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 SKU: JKS1636
    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_1600_jeep_spring_retainer_card.
    JKS Manufacturing
    JKS Manufacturing
    Rear Coil Spring Retainer | Wrangler JK SKU: JKS1600
    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/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 2-Door SKU: JSPEC152KFA
    Build the ultimate adventure rig with a 3.5" lift kit J-Krawl suspension system. Fits 2-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_2710_jeep_acos_pro_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_2710_jeep_acos_pro_rotation_1.
    JKS Manufacturing
    JKS Manufacturing
    Front Adjustable Coil Spacer Pro | Wrangler JK SKU: JKS2710
    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/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 SKU: JKS1634
    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/jks_1616_j_flex_control_arms_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_1616_j_flex_control_arms_rotation_1.
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Control Arms | Front Upper | Wrangler JL and Gladiator JT SKU: JKS1616
    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/media/jks_2510_jk_front_coilover_conversion_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_2510_fox_88406178_jk_front_coilover_card.
    JKS Manufacturing
    JKS Manufacturing
    Coilover Mounting Kit | Front | Wrangler JK SKU: JKS2510
    You want FOX Coil-overs on your JK Jeep Wrangler. JKS has the strongest easiest-to-install Coil-over conversion system in the industry. This kit fits the front position and accepts FOX 2.5" 10" travel Coil-overs -- including provisions to mount remote reservoirs. In addition to the...
    $573.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_2210_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 JK SKU: JKS2210
    Dial in ride height on your Jeep Wrangler JK 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 load distribution...
    $297.95
  • 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 SKU: JKS1666
    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_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" Lift Kit | J-Krawl | Wrangler JL 2-Door SKU: JSPEC147FRS
    From hardcore rock crawling to high-speed desert, the J-Krawl System brings a level of performance and adjustability that makes it the go to package for many Jeep enthusiasts. These systems build on the base systems and add comments for a full overhaul of the...
    From $2,834.45
  • 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
    2.5" Lift Kit | J-Krawl | Wrangler JL 4-door SKU: JSPEC125FRS
    Turn your 4 Door Jeep Wrangler JL into a serious off road rig with a JKS J-Krawl 2.5" lift kit. Designed for maximum articulation and adjustability, the complete suspension system includes dual rate coil springs, adjustable front track bar, rear track bar bracket and...
    From $2,834.45
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks2711_jeep_acos_card.https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks2711_jeep_acos_rotation_1.
    JKS Manufacturing
    JKS Manufacturing
    Front Adjustable Coil Spacer with Hydraulic Bump Stop | ACOS Pro | Wrangler JL and Gladiator JT SKU: JKS2711
    Fine tune your Jeep 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...
    $901.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_2550_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
    Rear Adjustable Coil Spacer | ACOS | Wrangler TJ & LJ SKU: JKS2550
    Dial in ride height on your Jeep Wrangler TJ or LJ with JKS ACOS adjustable rear coil spring spacers. The range of ride height adjustment is from 2" to 3-3/8" -- 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_1667_01.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_1667_02.jpg
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Control Arms | Rear Upper | Gladiator JT SKU: JKS1667
    Built up your Jeep Gladiator JT the right way with these high strength J-Flex rear adjustable lower control arms from JKS. Built for superior strength and smooth operation on/offroad, these arms allow you to correctly position the rear axle for a wide range of...
    $318.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_1662_01.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/jks_1662_02.jpg
    JKS Manufacturing
    JKS Manufacturing
    Adjustable Control Arms | Rear Lower | Gladiator JT SKU: JKS1662
    Built up your Jeep Gladiator JT the right way with these high strength J-Flex rear adjustable upper control arms from JKS. Built for superior strength and smooth operation on/offroad, these arms allow you to correctly position the rear axle and correct pinion angle on...
    $371.95
  • https://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/JKS1638_03.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/JKS1638_06.jpg
    JKS Manufacturing
    JKS Manufacturing
    J-Link Adjustable Control Arms | Rear Lower | Gladiator JT SKU: JKS1638
    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/JKS1637_03.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/JKS1637_01.jpg
    JKS Manufacturing
    JKS Manufacturing
    J-Link Adjustable Control Arms | Rear Upper | Gladiator JT SKU: JKS1637
    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/JKS1632_03.jpghttps://serenity-foxfactory.asset.akeneo.cloud/fox_asset_family/media/JKS1632_02.jpg
    JKS Manufacturing
    JKS Manufacturing
    J-Link Adjustable Control Arms | Front Lower | Wrangler JL SKU: JKS1632
    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

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