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Quadratec Maximum Duty 3.5in Coil Spring Suspension Lift Kit with Shocks for 07-18 Jeep Wrangler Unlimited JK 4 Door

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Quadratec's Maximum Duty Suspension Lift Kits provide a complete selection of lift options for budget-minded enthusiasts who want to transform the look and performance of their Wrangler. Our value-priced kits provide an economical means of fitting taller tire packages without breaking the bank. Our JK kits proudly pass the rigorous FMVSS 126 physical testing that accurately measures how the vehicle reacts after our suspension modifications. Test results prove that our suspension kits work in harmony with the Electronic Stability Control (ESC) system and retain the effectiveness for both vehicle performance and safety to reduce rollovers. Our kits come with excellent installation instructions with step by step photos and are easy to install with basic skills and hand tools. Quadratec's Maximum Duty Coil Spring Suspension Kits add an additional 3-1/2" of suspension and an excellent choice for fitting up to 35" tall tires. These premium kits replace your four factory length coil springs with our longer Maximum Duty Coils. Our coil springs begin with premium steel alloy material to ensure consistency and are preset to add memory and eliminate settling. Each spring CNC wound and then load tested to certify consistency through the spring's complete travel cycle. Our progressive rate coil spring are engineered to be within 10% of the factory rates with all the vigorous off-road handling capabilities while maintaining the smooth factory-like characteristics. Coil springs are easy to install with simple hand tools and do not require a spring compressor. The 3-1/2" Coil Spring Lift Kits include four Quadratec exclusive shock absorbers to help maximize both the street performance and off-road capabilities. These advanced kits are available with your choice of Hydro 7.0 or Nitro 8.0 shock absorbers and come complete with all the necessary hardware and brackets to retain proper vehicle alignment. Fully detailed installation instructions included.
Installation Notes
Installation Difficulty:
Level 3Advanced
For Use with Factory Style Differential Covers: The rear track bar bracket that comes with this kit is designed for use with differential covers that have a flat mounting lip. Covers with recessed bolt holes, or bulged castings are not compatible.
Installation Time: 6-8 hours
Parts Included

Front Coil Springs
Rear Coil Springs
Front Bump Stop Extensions
Rear Bump Stop Extensions
Front Shock Absorbers with Boots
Rear Shock Absorbers with Boots
Front Track Bar Re-alignment Bracket
Rear Track Bar Re-alignment Bracket
Front Brake Line Brackets
Rear Brake Line Brackets
Rear Track Bar Brace
Rear Sway Bar Links
Front Lower Cam Bolts
Rear Upper Cam Bolts

Limited Lifetime Warranty
  • Shocks Included: With Shocks
  • Max Tire Size: 35
  • Lift Height Range: 3 - 4.5 inch
  • Included Parts: Brake Line Extensions, Bump Stop Extensions, Cam Bolts, Front Track Bar Bracket, Rear Track Bar Bracket, Sway Bar Endlinks
  • Features: Short Arm
*Please make a selection above to view weight, specs of a specific product
  • Jeep Wrangler Unlimited 4-Door (JK)

  • 2018 Jeep Wrangler Unlimited 4-Door (JK)
  • 2017 Jeep Wrangler Unlimited 4-Door (JK)
  • 2016 Jeep Wrangler Unlimited 4-Door (JK)
  • 2015 Jeep Wrangler Unlimited 4-Door (JK)
  • 2014 Jeep Wrangler Unlimited 4-Door (JK)
  • 2013 Jeep Wrangler Unlimited 4-Door (JK)
  • 2012 Jeep Wrangler Unlimited 4-Door (JK)
  • 2011 Jeep Wrangler Unlimited 4-Door (JK)
  • 2010 Jeep Wrangler Unlimited 4-Door (JK)
  • 2009 Jeep Wrangler Unlimited 4-Door (JK)
  • 2008 Jeep Wrangler Unlimited 4-Door (JK)
  • 2007 Jeep Wrangler Unlimited 4-Door (JK)

Quadratec Maximum Duty 3.5in Coil Spring Suspension Lift Kit with Shocks Options

Part NumberCatalog #Price
16400 004616400.0046With Hydro 7.0 Shocks$499.99
16400 014616400.0146With Nitro 8.0 Shocks$529.99
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