JSPEC135PS by JKS Manufacturing: 3.5" Lift J-Kontrol Suspension System

The JSPEC135PS by JKS Manufacturing is engineered specifically for 2018-2025 Jeep Wrangler models, providing a robust 3.5" lift that enhances both on-road stability and off-road capability. This suspension system is a significant upgrade over the JKS J-Venture systems, featuring a true bolt-on design that integrates essential components for improved handling and performance.

Key Features

• Dual Rate Coil Springs: Available in standard or heavy-duty (HD) configurations, these springs are designed to deliver optimal ride quality across various terrains.
• Shock Options: Choose from a selection of shocks including JSPEC gas shocks, FOX 2.0 Performance Series, FOX 2.5 Performance Series, and FOX 2.5 Elite Series, all specifically valved for this suspension system.
• Adjustable Track Bar: The front adjustable track bar and rear track bar bracket correct axle positioning, ensuring proper alignment under the vehicle.
• Quicker-Disconnect Sway Bar Links: These links enhance off-road articulation, allowing for greater wheel travel when navigating challenging terrains.
• Bump Stop Extensions: Front and rear bump stop extensions are included to limit suspension up travel, preventing potential damage during articulation.
• Control Arm Correction Brackets: These brackets flatten the upper and lower control arm angles, correcting caster and improving overall handling.

Specifications

• Front Lift Method: Coil Spring
• Front Lift Height: 3.5"
• Rear Lift Method: Coil Spring
• Rear Lift Height: 3.5"
• Shocks Included: Yes

Installation Details

• Estimated Installation Time: Approximately 7 hours
• Difficulty Level: Moderately Easy
• Installation Instructions

Fitment

• Jeep Wrangler Rubicon Gas 2018-2025
• Jeep Wrangler Sport Gas 2018-2025
• Jeep Wrangler Sport S Gas 2018-2025
• Jeep Wrangler Rubicon Deluxe Gas 2019-2020
• Jeep Wrangler 80th Anniversary Gas 2021
• Jeep Wrangler Freedom Gas 2021, 2023
• Jeep Wrangler Islander Gas 2021
• Jeep Wrangler Willys Gas 2021-2025
• Jeep Wrangler Willys Sport Gas 2021-2024
• Jeep Wrangler Rubicon X Gas 2024-2025

Important Notes

• Factory wheels cannot be reinstalled without wheel spacers.
• HD front springs are recommended for vehicles equipped with an aftermarket winch/bumper combo.
• HD rear springs are advisable for setups with a rear-mounted full-size spare tire.
• A rear aftermarket driveshaft is recommended for 2-Door models.
• Shock extension brackets can be utilized on Rubicon models with stock FOX 2.5 shocks, but this may slightly limit suspension down travel.
• Trimming may be required during installation.

Recommended Tire and Wheel Combinations

• Rubicon Models:
  • 37 x 12.5 with 17 x 9 and 5 in. Backspace
  • 37 x 12.5 with 18 x 9 and 5 in. Backspace
  • 37 x 12.5 with 20 x 9 and 5 in. Backspace
• Non-Rubicon Models:
  • 35 x 12.5 with 17 x 9 and 5 in. Backspace
  • 35 x 12.5 with 18 x 9 and 5 in. Backspace
  • 35 x 12.5 with 20 x 9 and 5 in. Backspace