SKU: 20258705659

JK 4.0 Inch Lift Stage 4 Suspension System 07-18 Wrangler JK 2 DR Synergy MFG

Sale price$2166.72 Regular price$2407.47
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Ships within 48 hours · Estimated delivery Aug 13 - Aug 18

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Description

JK 4.0 Inch Lift Stage 4 Suspension System 07-18 Wrangler JK 2 DR Synergy MFGSynergy Jeep JK 4 Inch Lift Stage 4 Long Arm Suspension System is for those wanting maximum performance and capability without sacrificing ride quality. It carries over the quality components of the Stage 3 System, but improves upon them by swapping out the Standard Length Control Arms for Adjustable Long Arms and Long Arm Mounting Brackets. This is a 100 percent bolt on system with no welding required. This system will fit 37 inch tires with stock

Synergy Jeep JK 4 Inch Lift Stage 4 Long Arm Suspension System is for those wanting maximum performance and capability without sacrificing ride quality. It carries over the quality components of the Stage 3 System, but improves upon them by swapping out the Standard Length Control Arms for Adjustable Long Arms and Long Arm Mounting Brackets. This is a 100 percent bolt on system with no welding required. This system will fit 37 inch tires with stock fenders or 40 inch tires with high fenders.
Details:

  • Fits 07-18 Jeep Wrangler JK 2-Door
  • Stage 4 key features are front and rear track bar relocation brackets, flipped drag link, and all adjustable upper lower long arms
  • Front and rear bump stop extension kits
  • Front and rear sway bar links
  • Front and rear extended Stainless Steel steel braided brake lines
  • Synergy double adjuster sleeve pinch bolt assembly allows for adjustment of control arm, track bar, tie rod, and drag link length without removal
  • Front and rear track bar relocation brackets raise track bar mounting positions increasing suspension roll center heights which improves handling on and off road
  • Lower control arms are manufactured from high quality crush resistant 2X.250 inch Wall 1026 DOM tubing
  • Features Synergy Dual Durometer Bushings (DDB) with Teflon bearing surface for a maintenance free design focusing on performance, flex, longevity, and ride quality.
  • Front and rear lower shock mounts
  • Optional front sway bar disconnect system for ultimate trail articulation mounts sway bar up and out of the way when disconnected from the axle
  • Progressive wound coil spring manufactured using the latest in CNC hot winding technology keeps spring from coming unbound at full suspension droop
  • Suspension components feature an abrasion-resistant Powdercoat finish for maximum durability and corrosion resistance
  • 100 percent bolt on components assure an easy, trouble free installation with the use of basic hand tools
  • Requires a maximum 4-3/4 inch backspace wheel or wheel spacer with factory wheel setup. 4-1/2 inch back spacing is recommended
  • Synergy suspension systems are a modular design so all components are available separately

Note:

  • 2012+ JK's lifted over 2 inch will require exhaust spacers (5017), or a front aftermarket drive shaft to prevent interference with the exhaust
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 20258705659

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4.4 ★★★★★
Based on 18 reviews
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Verified Purchase
Robert Schneider
Boise, US
★★★★★ 1
Is this a Casper or Tempurpedic?
When I went to wash the pillow covering I discovered that it iterally had a Tempurpedic factory pillow covering underneath the Casper factory pillow covering - leading me to believe that it was either a return item shipped out as new, and the previous owner actually returned a Tempurpedic pillow disguised as a Casper, or Casper is actually manufactured by Tempurpedic and uses the Casper brand to upcharge. Either way - it's turned out to be an overly expensive - mediocre pillow.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 25, 2025
J
Verified Purchase
Joe G
Battle Creek, US
★★★★★ 2
Does not cool, is hot actually
I am very disappointed with this product. I write a lot of reviews and give credit where credit is due. I wish credit was due here. I bought this as a gift for my wife. She slept on it for a few nights and finally stated that it never cools and is hot instead. And so I tried it and found the same thing. I bought an inexpensive cooling pillow from Costco and we both found that one to cool a little bit and it isn’t hot. I’m summary, you don’t always get what you pay for and at $100, this pillow does not deliver. It’s supportive and it seems well made, which is why I give it two stars. But it does not deliver any cooling. Save your money and try a different pillow.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 5, 2024
J
Verified Purchase
John
Massapequa, US
★★★★★ 5
Does what it claims, supportive and eliminates heat.
Size: King (Pack of 1), Style: Single Pack
Its a bit pricey however when it comes to sleep quality im glad to pay for name brand. No tossing or turning to escape to the cold side of the pillow. Feels firm which was concerning at first however once you settle in its very comfortable. Seems to be just how foam pillows are made. Happy with the purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2022
D
Verified Purchase
Donna Rollins
Port Orchard, US
★★★★★ 5
I have found the PERFECT pillow for me!!!
Size: King (Pack of 1), Style: Single Pack
I just absolutely never write a review on anything, but I have to praise this pillow from the rooftops! I have not slept this comfortably is so many years! I have plushness and support, my neck is in alignment, and when I turn to sleep on my side the pillow doesn’t block my airflow. This pillow is perfectly made for me!!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 8, 2022
M
Verified Purchase
Melissa
Alexandria, US
★★★★★ 5
The Perfect Pillow
Size: Queen (Low Loft)
Finally found the right pillow for me. I have purchased quite a few latex pillows attempting to find the right one. I was apprehensive due to the support description being "extra soft". Yes, it's super soft when you pick it up and squeeze it, but it provides the perfect amount of support for side and back sleeping.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026

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