JKS JSPEC159PES 3.5in J-Konnect FOX 2.5 Elite Diesel 392 Lift Kit Wrangler JL

Vehicle Fitment

• 2018-2026 Jeep Wrangler JL Unlimited 4-Door with 3.0L EcoDiesel V6 engine, 4WD
• 2021-2026 Jeep Wrangler JL Unlimited Rubicon 392 with 6.4L V8 engine, 4WD

Fitment Notes

• Diesel and Rubicon 392 engines only - for gas-engine (3.6L/2.0T) JL 4-Door J-Konnect 3.5" FOX 2.5 Elite see JSPEC123PES
• 4-Door (Unlimited JL) only
• Does not fit 2021-2026 Jeep Wrangler JL 4xe (plug-in hybrid) models
• HD front coil springs (JSPEC1352) included as standard - required to achieve correct lift height and ride quality with the heavier Diesel and 392 front end
• Factory wheels cannot be reinstalled without wheel spacers after lift
• Maximum recommended tire size: 35x12.50 on 17x9, 18x9, or 20x9 wheels with 5" backspacing (Sport/Sahara/Willys); 37x12.50 (Rubicon with 5" backspacing)

Features

• FOX 2.5 Performance Elite Series shocks with external reservoirs and DSC dual-speed compression adjusters for user-tunable damping - the top-tier shock upgrade for the JL J-Konnect system
• 2.5" diameter 6061-T6 hard-anodized aluminum shock bodies with 7/8" extreme-duty chrome shafts for superior heat dissipation and fade-free off-road performance
• JSPEC HD dual-rate front coil springs (JSPEC1352) and standard-rate rear coil springs (JSPEC1359) tuned for the heavier EcoDiesel V6 and 6.4L V8 front-end weight
• Front and rear J-Link lower control arms (2" x .250-wall DOM tubing) correct front caster and rear wheelbase with serious strength over factory arms
• OE-style rubber bushings at both J-Link arm ends minimize NVH for a quiet, street-friendly ride
• JKS front adjustable track bar and rear track bar bracket correct axle positioning at lifted ride height
• JKS2033 Quicker Disconnect front sway bar links unlock up to 30% more front axle articulation on the trail
• Rear extended sway bar links correct operating angle and improve strength at lifted height

Specifications

• Lift Height: 3.5 inches
• Platform: Jeep Wrangler JL Unlimited 4-Door - EcoDiesel V6 and Rubicon 392 V8
• System Level: J-Konnect with FOX 2.5 Performance Elite Series shocks (top-tier shock option)
• Front Shock: FOX 2.5 Performance Elite - PN 883-26-051 (2.5" remote reservoir, DSC adjuster)
• Rear Shock: FOX 2.5 Performance Elite - PN 883-26-055 (2.5" remote reservoir, DSC adjuster)
• Shock Body: 2.5" impact extruded CNC-machined 6061-T6 aluminum, hard anodized
• Shock Shaft: 7/8" extreme-duty hard chrome and heat-treated alloy steel
• Shock Damping: FOX DSC dual-speed compression adjuster (user-adjustable)
• Front Spring: JSPEC1352 HD Rate (Diesel/392 specific)
• Rear Spring: JSPEC1359 Standard Rate
• Control Arm Construction: 2" x .250-wall DOM tubing, fixed length J-Link lower arms (JKS1671)
• Max Recommended Tire Size: 35x12.50 (Sport/Sahara/Willys); 37x12.50 (Rubicon)
• Recommended Wheel Backspacing: 5 inches
• Installation Type: Bolt-on, no cutting or drilling
• Warranty: Limited Lifetime (JKS components); FOX Shocks covered by FOX limited warranty
• Made in USA

Included Components

• 2x JSPEC HD Dual-Rate Front Coil Springs (HD Rate - JSPEC1352, Diesel/392 specific)
• 2x JSPEC Dual-Rate Rear Coil Springs (Standard Rate - JSPEC1359)
• 2x FOX 2.5 Performance Elite Front Shocks with external reservoir and DSC adjuster - PN 883-26-051
• 2x FOX 2.5 Performance Elite Rear Shocks with external reservoir and DSC adjuster - PN 883-26-055
• 2x Front J-Link Lower Control Arms (fixed length, 2" x .250-wall DOM - JKS1671)
• 2x Rear J-Link Lower Control Arms (fixed length, 2" x .250-wall DOM - JKS1671)
• 1x JKS Front Adjustable Track Bar (JKS1621)
• 1x Rear Track Bar Bracket
• 1x Pair JKS2033 Quicker Disconnect Front Sway Bar Links
• 1x Pair Rear Extended Sway Bar Links
• 1x Set Front and Rear Bump Stop Extensions
• 1x Installation hardware pack (JSPEC1311 J-Konnect Main Box Kit)

Product Description

The JKS JSPEC159PES is the FOX 2.5 Performance Elite variant of the 3.5" J-Konnect suspension lift system for 2018-2026 Jeep Wrangler JL Unlimited 4-Door models equipped with the 3.0L EcoDiesel V6 or 6.4L Rubicon 392 V8. Every component is identical to the JSPEC159KFA, with one critical upgrade: the FOX 2.5 Performance Elite Series shocks. These 2.5"-diameter remote reservoir monotube shocks feature hard-anodized 6061-T6 aluminum bodies, 7/8" extreme-duty chrome shafts, and FOX's DSC dual-speed compression adjuster - letting the driver independently tune high-speed and low-speed compression damping to match conditions. The external reservoir provides increased oil and nitrogen capacity for fade-free performance during sustained hard use on the trail.

The Diesel/392-specific foundation remains intact: JSPEC1352 HD-rate front coil springs are included as standard to account for the heavier front-end weight of the diesel and V8 engines, paired with standard-rate JSPEC1359 rear springs. Front and rear J-Link lower control arms fabricated from 2" x .250-wall DOM tubing correct front caster and rear wheelbase at 3.5" of lift. A JKS front adjustable track bar, JKS2033 Quicker Disconnect sway bar links, and rear extended sway bar links complete the geometry correction package. Does not fit 4xe models.