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3.5" Suspension System | J-Kontrol | 2007-2018 Jeep Wrangler JK (4 Door)


J-Kontrol J-Rated 3.5" Suspension System Lift Kit

  • Front+Rear Dual Rate Coil Springs designed to great ride and improved performance across any terrain.
  • Front+Rear Gas Shocks (JSPEC or FOX 2.0 Adventure Series IFP) specifically valved for this suspension system for improved performance on and off-road.
  • Front Adjustable Track Bar and Rear Track Bar Bracket to correct axle positioning under vehicle.
  • Front Sway Bar Quicker Disconnects and Brake Line Brackets to allow for increased offroad articulation.
  • Front Control Arm Relocation Brackets to improve suspension geometry for improved handling.
  • HD Drag Link Flip Kit w/ Track Bar Bracket to improve steering angles for better handling.
  • Front+Rear Bump Stop Extensions to properly limit suspension up travel.
5-6 Hours
3 of 5 Difficulty
Pricing: $1,584.93

Customize Your Item

- Shock Selection -
 * required
- Steering Stabilizer -
 * required
- J-Cal/Flashcal Programmer -
 * required
- Exhaust Extension Kit -
 * required


Building off of the J-Venture systems designed for equal parts on-road handling and off-road capability, the J-Kontrol system adds in front control arm correction brackets and a drag link flip kit. These control arm brackets further enhance the on-road handling by flattening out the control arm to more closely mimic factory angles while correcting caster. The drag link flip kit flattens the steering angle to mimic factory angles. These combined with the dual rate coil springs, specially valved gas shocks, adjustable track bar, quicker disconnects and more these systems are very solid for the daily driver or beach cruiser, that is not afraid to get out on the trail and mix it up. Take control with J-Kontrol.


  1. 2012-2018 Models with 3.6L Pentastar motor will require exhaust modification for driveshaft clearance at full suspension droop, use JKS8150 exhaust extensions.
  2. Rubicon sway bar link hardware included in kit.
  3. Requires 17" or larger wheels with 4.5" BS (or smaller) for steering clearance.

Base Kit

Base Kit components include the following;

J-Kontrol 3.5" Suspension System | 2007-2018 Jeep Wrangler JK (4 Door) -JSPEC108K
- JSPEC9301 2ea - JSPEC- 25.20 x 15.20 x 2-3/8 - S50/EB2
- JSPEC9309 2ea - JSPEC- 25.95 x 15.40 x 2 - BP18/EB1
- JSPEC2350 1ea - 07-16 JK 4Dr 3.5" Coil Box Kit
- JSPEC2353 1ea - 07-16 Jeep JK J Kontrol Box Kit
- JSPEC2450 1ea - JK Advanced Geometry Upgrade Kit

Max Tire

Tire Wheel Backspacing
35x12.50 16x8/17x9/20x9 4.5"

* Other tire/wheel sizes can be used, however may require additional modification.

Shipping Information

  • Item Requires Shipping
  • 145.0 lbs.
  • W12.0000” x H12.0000” x L36.0000”