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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...

55 products found in Hardcore Upgrades

Adjustable Control Arms | Front Upper | Wrangler TJ / LJ Cherokee XJ / Comanche MJ / Grand Cherokee ZJ and WJ
  • $292.55
Brand: JKS
SKU: JKS1652

Front Adjustable Coil Spacer with Bump Stop | ACOS | Wrangler JL and Gladiator JT
  • $327.75
Brand: JKS
SKU: JKS2211

Adjustable Control Arms | Front Upper | Wrangler JK
  • $350.85
Brand: JKS
SKU: JKS1615

Adjustable Control Arms | Rear Upper | Wrangler JK
  • $350.85
Brand: JKS
SKU: JKS1665

Adjustable Control Arms | Front Lower | Wrangler JL and Gladiator JT
  • $409.15
Brand: JKS
SKU: JKS1625

Adjustable Control Arms | Front Lower | Wrangler JK
  • $409.15
Brand: JKS
SKU: JKS1610

Adjustable Control Arms | Lower | Wrangler TJ & LJ, Cherokee XJ
  • $409.15
Brand: JKS
SKU: JKS1650

Front Adjustable Coil Spacer | ACOS | Wrangler TJ & LJ, Cherokee XJ, Comanche MJ, Grand Cherokee ZJ
  • $304.65
Brand: JKS
SKU: JKS2200

Adjustable Control Arms | Front Upper | Wrangler JL and Gladiator JT
  • $333.25
Brand: JKS
SKU: JKS1616

HD Leaf Spring Shackle | Cherokee XJ, Comanche MJ, Wagoneer SJ
  • $129.75
Brand: JKS
SKU: JKSOGS651

Adjustable Control Arms | Rear Lower | Wrangler JK
  • $409.15
Brand: JKS
SKU: JKS1660

Adjustable Coil Spacer with Bump Stop | ACOS Pro | Wrangler TJ & LJ, Cherokee XJ, Comanche MJ, Grand Cherokee ZJ
  • $1,032.85
Brand: JKS
SKU: JKS2700

Adjustable Control Arms | Rear Upper | Wrangler TJ, LJ Grand Cherokee ZJ
  • $350.85
Brand: JKS
SKU: JKS1655

Adjustable Control Arms | Rear Upper | Gladiator JT
  • $350.85
Brand: JKS
SKU: JKS1667

3.5" Lift Kit | J-Krawl | Wrangler JK 4-Door
  • From $3,000.25
Brand: JKS
SKU: JSPEC151KFA

Rear Adjustable Coil Spacer| ACOS | Wrangler JL
  • $437.75
Brand: JKS
SKU: JKS2571