JKS JSPEC163KFA 2.5in J-Konnect FOX Diesel 392 Lift Kit Jeep Wrangler JL 4-Door

Vehicle Fitment

• 2020-2026 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 2.5" see JSPEC121KFA
• 4-Door (Unlimited JL) only
• Does not fit 2021-2026 Jeep Wrangler JL 4xe (plug-in hybrid) models
• HD front coil springs included as standard - required for 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

• JSPEC HD dual-rate front coil springs and standard-rate rear coil springs tuned for the heavier EcoDiesel V6 and 6.4L V8 front-end weight at 2.5" lift
• Custom-valved FOX 2.0 Adventure Series IFP monotube gas shocks matched to this Diesel/392 JL J-Konnect 2.5" system
• Front and rear J-Link lower control arms (heavy-duty 2" x .250-wall DOM tubing) add serious strength over factory arms while correcting front caster and rear wheelbase
• OE-style rubber bushings at both J-Link arm ends minimize NVH for a quiet, street-friendly ride
• Adjustable front and rear track bars correct front and rear axle positioning at lifted ride height - a key advantage over gas-engine J-Konnect kits which include only a front adjustable bar
• 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
• Front and rear bump stop extensions properly limit suspension up-travel at lifted height

Specifications

• Lift Height: 2.5 inches
• Platform: Jeep Wrangler JL Unlimited 4-Door - EcoDiesel V6 and Rubicon 392 V8
• System Level: J-Konnect (adds J-Link lower control arms over J-Venture)
• Shock Series: FOX 2.0 Adventure Series IFP (custom-valved for this system)
• Control Arm Construction: 2" x .250-wall DOM tubing, fixed length J-Link lower arms (JKS1671)
• Front Spring: JSPEC1352 HD Rate (Diesel/392 specific)
• Rear Spring: JSPEC1359 Standard Rate
• Track Bar: Adjustable front track bar and adjustable rear track bar bracket
• 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 2.0 Adventure Series IFP Front Shocks - FOX98450323 (custom-valved)
• 2x FOX 2.0 Adventure Series IFP Rear Shocks - FOX98450327 (custom-valved)
• 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 Adjustable 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

Product Description

The JKS JSPEC163KFA is a complete 2.5" J-Konnect suspension lift system for 2020-2026 Jeep Wrangler JL Unlimited 4-Door models equipped with the 3.0L EcoDiesel V6 or 6.4L Rubicon 392 V8. The J-Konnect step-up over J-Venture - front and rear J-Link lower control arms fabricated from 2" x .250-wall DOM tubing - is fully present here, correcting front caster and rear axle wheelbase at 2.5" of lift while delivering a meaningful strength advantage over the factory lower arms. OE-style rubber bushings at both ends maintain the quiet, controlled on-road character that diesel owners demand.

The Diesel/392-specific calibration centers on the front coil spring: JSPEC1352 HD-rate fronts replace the standard-rate springs used in gas-engine kits, properly supporting the heavier front-end weight of the diesel and V8 powerplants. This kit also includes both a front and rear adjustable track bar - allowing precise front and rear axle centering independently - a distinction from gas-engine J-Konnect kits. Custom-valved FOX 2.0 Adventure Series IFP shocks, JKS2033 Quicker Disconnect sway bar links, and rear extended sway bar links complete the system. Does not fit 4xe models.