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Synergy 2-Door 4.0 In./ 4-Door 3.0 In. Rear Lift Springs (07-18 Jeep Wrangler JK)

Item J101350
ExtremeTerrain no longer carries the Synergy 2-Door 4.0 In./ 4-Door 3.0 In. Rear Lift Springs (07-18 Jeep Wrangler JK). Please check out 2007-2018 Jeep Wrangler JK Coil Springs & Accessories for an updated selection.
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Features & Details

  • Provides 4 Inches of Lift on 2 Door Models
  • Provides 3 Inches of Lift on 4 Door Models
  • Progressively Wound
  • Accommodates 35-37 Inch Tires
  • Excellent Off Road Performance
  • Abrasive and Corrosion Resistant
  • Black Powder-Coated Finish
  • Designed for 2007-2018 Jeep Wrangler JK 2-Door and 4-Door Models

Performance. The Synergy 2-door 4.0"/ 4-door 3.0" Rear Lift Springs are designed to improve the quality and comfort of your vehicle's off road performance. They are progressively wound to prevent annoying clanking noise and also keep the springs from coming apart at suspension droop. You'll find these springs will allow you to run 37 inch tires on your 2 door JK and 35 inch tires on 4 door applications.

Construction. These rear lift springs are abrasive resistant and have black powder-coated finish to offer durability and also prevent damage due to corrosion. These rear lift springs are full frequency balanced and feature tuned spring rates for the most in performance and reliability.

Application. These Synergy 2-Door 4.0 In./ 4-Door 3.0 In. Rear Lift Springs designed 2007-2018 Jeep Wrangler JK 2-door and 4-door models.

Fitment: Details

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What's in the Box
  • (2) Rear lift springs
Installation Info
Tech Specs
Will it fit my Wrangler?
  • JK Rubicon 2 Door - 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
  • JK Rubicon 4 Door - 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
  • JK Wrangler 2 Door - 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18
  • JK Wrangler 4 Door - 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18

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      Questions & Answers (1)

      1 Top Rated Question

      What are this springs rated at 645 or 900. the 4 door stiffer springs are closer to 900 that's what I am looking for. thanks

      • Thank you for your question. The Synergy 2-Door 4.0 In./ 4-Door 3.0 In. Rear Lift Springs are multi-rate coil springs.

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        Customer Reviews (3) Write a Review

        Overall Rating 5

        out of 5 stars

        Installation Time:Afternoon

        • Fit 5 5
        • Appearance 4.666667 4.7
        • Bang For Your Buck 4.666667 4.7



        • 5/5

          Installation Time: Afternoon

          January 22, 2018

          New Springs

          Had 3” spacers on top of stock springs until I could afford new ones. WOW !! What a difference!! Even my Wife was impressed ! No more Top Heavy feel while cornering, and a much smoother ride, On and Off the pavement.

          Haystack

          Year: 2010Submodel: Wrangler

          Helpful (10)

        • 5/5

          Installation Time: Afternoon

          June 12, 2017

          Quality Springs!

          I bought the Synergy 3 inch rear lift springs for my JKU to get back the rake I lost from my original lift (different manufacturer). Synergy coils are designed to maintain the factory rake of the vehicle, which I like. No longer does my Jeep squat when loaded up for a trip. I also noticed that on road ride quality also improved over my last set of springs. Small bumps like cracks in the road are absorbed more gracefully and with less of a shudder from the Jeep. Washboard roads are also more comfortable now. There must be something to the dual rate hype because I've noticed absolutely no performance compromises off road. I gave these springs 4/5 for value because there are so many other springs out there for the same price. I do think these are among the best coils out there, though. I also gave a 4/5 for appearance because almost all coils are powdercoated black. I'll admit that I prefer the silver/grey of my old springs. However, the finish on these seems to be high quality and has held up very well to the past several months of snow, ice, salt, dirt, mud, and water. If you're looking for a comfortable rear coil that actually provides the same lift front and rear, I'd highly recommend these.

          EricM

          Year: 2009Submodel: Rubicon

          Helpful (10)

        • 5/5

          Installation Time: Afternoon

          June 12, 2015

          Great springs

          Exactly what I wanted great price and in stock. Springs have almost no sag after install ride great and are quiet offroad.

          johnnytaterhead

          Year: 2008

          Helpful (12)

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