3.5" 2007-2018 Jeep Wrangler JK (4 Door) J-Max Lift Kit by JKS

JSPEC153KFA JKS J-Max 3.5-inch Suspension System is engineered for 2007–2018 Jeep Wrangler JK models and delivers a fully coilover-based performance suspension built for serious off-road use. Designed around 10-inch travel FOX 2.5 Factory Race Series remote reservoir DSC coilovers, this system provides race-proven damping technology with dual-speed compression adjustment for precise control in a wide range of terrain conditions. The large 2.5-inch shock body increases oil volume for improved heat dissipation and consistent performance during aggressive trail use.

At each corner, custom dual-rate coil springs are paired with the FOX 2.5 Reservoir DSC coilovers to dial in ride height and balance on-road stability with maximum off-road articulation. The Dual Speed Compression (DSC) adjusters allow independent tuning of high- and low-speed compression, giving drivers the ability to fine-tune performance for rock crawling, high-speed desert terrain, or daily driving. High-strength bolt-on coilover mounting brackets are included to ensure proper installation and long-term durability.

The J-Max system replaces all eight factory control arms with heavy-duty J-Flex or J-Link adjustable upper and lower control arms, available with either Flex End joints for maximum articulation or maintenance-free rubber bushings for reduced NVH and improved street comfort. These adjustable arms allow precise correction of caster, pinion angle, and wheelbase, ensuring optimal suspension geometry after lifting. A front adjustable track bar, rear track bar bracket, front sway bar Quicker Disconnects, and front and rear bump stop extensions complete the package for a fully tunable, high-articulation suspension system. Due to the increased suspension travel, an aftermarket front driveshaft is strongly recommended.

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