JKS JSPEC187PES J-Krawl 3.5" Suspension Lift System 4-Door with Fox 2.5 PES Shocks and HD Rate Coils

The JKS JSPEC187PES J-Krawl 3.5" Suspension System is a complete, performance-engineered lift kit designed for the 4-door Jeep Wrangler JL. Built for serious off-road enthusiasts, this system delivers a full overhaul of the factory suspension with a focus on maximum articulation, strength, and precision adjustability — whether you're rock crawling or running high-speed desert trails.

At the heart of this kit are eight high-strength control arms — front and rear upper and lower — that build off the factory suspension mounting points to optimize driveline and suspension geometry. The adjustable upper control arms allow you to dial in front caster, rear pinion angle, and overall vehicle wheelbase for a fully tuned setup.

This specific variant pairs the J-Krawl system with Fox 2.5 Performance Elite Series (PES) Remote Reservoir shocks front and rear — featuring digressive shock valving (DSC) for superior on- and off-road damping performance. Front shocks are the remote reservoir configuration, while rear shocks are the piggyback style. The kit is completed with heavy-duty (HD) rate coil springs, tuned specifically for 4-door JL applications with added load capacity.

Key Features:

• 3.5" lift engineered specifically for the 4-door Jeep Wrangler JL platform
• Fox 2.5 PES Remote Reservoir shocks (front) with digressive shock valving (DSC) for maximum damping control
• Fox 2.5 PES Piggyback shocks (rear) with DSC for consistent off-road performance
• HD-rate dual-rate coil springs — progressively wound for a plush highway ride with increased performance under load
• Eight adjustable J-Flex or J-Link control arms (front/rear, upper/lower) for maximum articulation and geometry tuning
• Factory-style rubber bushings to reduce Noise, Vibration, and Harshness (NVH)
• Adjustable front track bar for proper axle centering at ride height
• Rear track bar bracket for corrected rear axle geometry
• Front sway bar quicker disconnects for improved off-road flex
• Front and rear bump stop extensions to properly limit suspension up-travel
• Brake line brackets and all required hardware included
• Made in the USA by JKS Manufacturing

JKS J-Rated progressive coil springs deliver a compliant ride during everyday driving while stiffening progressively under compression for trail-ready performance. The optional HD-rate springs in this configuration are ideal for builds carrying extra gear or heavier accessories. All components are proudly designed and manufactured in the United States.