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3.5" Suspension System | J-Venture | 2018-2021 Jeep Wrangler JL (4 Door)


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

  • Front and rear dual rate coils springs (standard or HD)
  • JSPEC Custom Valve Gas Shocks or FOX 2.0 Performance IFP Shocks
  • JKS MFG front adjustable track bar
  • JKS MFG front sway bar quicker disconnects
  • Front caster cam locks
  • Front/Rear bump stop extensions
  • Rear extended sway bar links
  • Rear track bar bracket
5-6 Hours
2 of 5 Difficulty
Pricing: $1,191.43

Customize Your Item

- Shock Selection -
 * required
- Front Coil Springs -
 * required
- Rear Coil Springs -
 * required
- Steering Stabilizer -
 * required
- J-Cal/Flashcal Programmer -
 * required


The J-Venture suspension system is the baseline that all J-Rated systems are built from. Designed for equal parts on-road handling and off-road capability, these J-Venture systems have been engineered to include all of the essentials without over-complicating the system. From high quality dual rate coil springs to specially valved gas shocks, the JKS adjustable track bar and the quicker disconnects and more, these J-Venture systems offer more performance from you Jeep Wrangler. Get out and explore with J-Venture.


  1. Factory wheels cannot be reinstalled without wheel spacers
  2. HD front springs recommended for applications with aftermarket winch/bumper combo
  3. HD rear springs recommended for applications with rear mounted full size spare tire
  4. Will not fit 4xe models
  5. Will not fit Rubicon 392 models

Base Kit

Base Kit components include the following;

- JSPEC1302 1ea - 2018 JL 3.5in Box Kit
- JSPEC1351 1ea - JL 3.5in Front Coil Spring Kit - STD
- JSPEC1359 1ea - JL 3.5in Rear Coil Spring Kit - STD
- JSPEC9322 2ea - JSPEC - 26.2 x 15.67 x 2-3/8 - EB1/EB1
- JSPEC9328 2ea - JSPEC - 30.95 x 18.18 x 2-3/8 - EB1/EB1

Max Tire

Rubicon Models (all kits)
37x12.50 17x9, 18x9, 20x9 5" BS

Non-Rubicon Models (all kits)
35x12.50 17x9, 18x9, 20x9 5" BS

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

Shipping Information

  • Item Requires Shipping