JKS JSPEC1351 3.5in Front 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), 4WD - Front Position, 3.5" Lift

Fitment Notes

• Front position only - sold as a pair (2 coil springs)
• 4-Door (Unlimited JL) specific - spring rate tuned for 4-Door weight and geometry; installing on a 2-Door JL will result in more than 3.5" of lift
• Standard duty rate - for heavier builds with winch/bumper or rear-mounted spare, use the HD rate version
• Designed to be used as part of a complete JSPEC JL 3.5" lift system; matching rear springs are JSPEC1359
• Does not fit 4xe models - separate spring set required for JL 4xe

Features

• Dual-rate progressive design provides a soft initial rate for on-road comfort that firms up progressively under off-road loads
• Custom-wound to JKS specifications for the 4-Door JL front suspension at 3.5" lift height
• Scragged to eliminate settling after installation - maintains 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: Front
• Lift Height: 3.5 inches (4-Door JL)
• Spring Type: Dual-rate (progressive rate)
• Rate: Standard Duty
• Quantity: 2 coil springs (pair)
• Dimensions: 23 x 12 x 6 inches
• Weight: 30.90 lbs (pair)
• Finish: Black powder coat
• Warranty: Limited Lifetime
• Made in USA

Included Components

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

Product Description

The JKS JSPEC1351 is a pair of 3.5" JSPEC dual-rate front coil springs engineered specifically for 2018+ Jeep Wrangler JL Unlimited 4-Door models. Custom-wound to JKS's specifications for the 4-Door JL front suspension, these standard-duty springs are the direct front spring component found in JKS's 3.5" lift systems including the J-Venture, J-Kontrol, and J-Konnect JL kits. The dual-rate progressive design delivers a composed, comfortable ride at highway speeds that firms up predictably under off-road loads - adapting to varying terrain and load conditions without compromise.

Each spring is scragged to eliminate post-installation settling and shot-peened for improved long-term durability. These are the correct springs for 4-Door JL builds; the spring rate is tuned for the 4-Door's heavier front end, and installing them on a 2-Door JL will yield more than 3.5" of lift. For heavier 4-Door builds with winch/bumper combos or a rear-mounted full-size spare, the HD rate version is recommended. Matching rear coil springs are JSPEC1359.