JKS JSPEC1359 3.5in Rear Dual-Rate Coil Springs 2018+ Jeep Wrangler JL 4-Door

Vehicle Fitment

• 2018-2026 Jeep Wrangler JL Unlimited 4-Door (Sport, Sport S, Sahara, Rubicon, Willys, High Altitude, Freedom - Gas, Diesel, and EcoDiesel), 4WD - Rear Position, 3.5" Lift

Fitment Notes

• Rear position only - sold as a pair (2 coil springs)
• 4-Door (Unlimited JL) specific - spring rate tuned for 4-Door weight distribution; installing on a 2-Door JL will result in more than 3.5" of rear lift
• Standard duty rate - for heavier builds with rear-mounted full-size spare, roof rack, or significant accessory weight, use the HD rate version
• Used across multiple JL 3.5" lift systems including J-Venture, J-Kontrol, and J-Konnect (Gas and Diesel variants)
• Matching front coil springs are JSPEC1351 (Standard Rate Gas) or JSPEC1352 (HD Rate / Diesel / Gladiator)
• Does not fit 4xe models - separate rear spring set required for JL 4xe

Features

• Dual-rate progressive design provides a compliant initial rate for on-road comfort that firms up under increased off-road loads and heavier payloads
• Longer overall length allows the use of longer shocks for maximum suspension wheel travel
• Custom-wound to JKS specifications for the 4-Door JL rear suspension at 3.5" lift height
• Scragged to eliminate settling after installation and maintain lift height over time
• Shot-peened to increase surface area and significantly improve long-term durability
• Powder-coated finish for corrosion resistance
• Compatible with all JSPEC and FOX shocks used in JKS 3.5" JL lift systems

Specifications

• Position: Rear
• Lift Height: 3.5 inches (4-Door JL)
• Spring Type: Dual-rate (progressive rate)
• Rate: Standard Duty
• Quantity: 2 coil springs (pair)
• UPC: 814897012394
• Finish: Black powder coat
• Warranty: Limited Lifetime
• Made in USA

Included Components

• 2x JSPEC 3.5" Rear Coil Springs - Standard Rate (pair)

Product Description

The JKS JSPEC1359 is a pair of 3.5" JSPEC dual-rate rear coil springs engineered for 2018+ Jeep Wrangler JL Unlimited 4-Door models. Custom-wound to JKS specifications for the 4-Door JL rear suspension, these standard-duty springs serve as the direct rear spring component across JKS's full line of 3.5" JL lift systems - including the J-Venture (JSPEC119K), J-Kontrol (Gas and Diesel), and J-Konnect variants. The dual-rate progressive design delivers a plush rear ride at highway speeds that firms up predictably under off-road loads or heavier payloads, adapting to changing terrain and load conditions without compromise.

Each spring is scragged to eliminate post-installation settling and shot-peened for improved long-term fatigue resistance. The longer overall coil length is intentionally designed to permit the use of longer shock absorbers, maximizing rear suspension wheel travel at lifted height. These are 4-Door-specific springs; installing on a 2-Door JL will result in more rear lift than rated. For rear-mounted spare tires, roof racks, or other heavy accessory loads, the HD rate version is recommended. Matching front springs are JSPEC1351 (standard rate) or JSPEC1352 (HD/Diesel/Gladiator).