SKU: 45568336453

JK 4.0 Inch Lift Stage 3 Suspension System 07-18 Wrangler JK 2 DR Synergy MFG

Sale price$1840.50 Regular price$2045.00
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Description

JK 4.0 Inch Lift Stage 3 Suspension System 07-18 Wrangler JK 2 DR Synergy MFGSynergy Jeep JK 4 Inch Lift Stage 3 Suspension System includes all the components from the Stage 2 System but exchanges the Fixed Length Lower Control Arms for Adjustable Lower Control Arms (8051, 8052) and adds Adjustable Upper Control Arms (8053, 8054) front and rear. The Adjustable Control Arms are required for locating the front rear axles with lift heights over 3 inch for adjusting the pinion angles when using aftermarket 1310 1350 drive shafts.

Synergy Jeep JK 4 Inch Lift Stage 3 Suspension System includes all the components from the Stage 2 System but exchanges the Fixed Length Lower Control Arms for Adjustable Lower Control Arms (8051, 8052) and adds Adjustable Upper Control Arms (8053, 8054) front and rear. The Adjustable Control Arms are required for locating the front/rear axles with lift heights over 3 inch for adjusting the pinion angles when using aftermarket 1310-1350 drive shafts. This system also adds Front and Rear Adjustable Track Bars for centering the axles under the vehicle at the increased ride height. 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 3 key features are front and rear track bar relocation brackets, flipped drag link, and adjustable upper and lower control 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 manufactured from high quality crush resistant 1-3/4X.188 inch Wall 1026 DOM tubing to increase durability and correct caster
  • 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

Notes:

  • 2012+ JK's lifted over 2 inch will require exhaust spacers (5017), or a front aftermarket drive shaft to prevent interference with the exhaust.
  • 3 inch and up lifts, aftermarket driveshafts are recommended
  • Springs are designed to provide the advertised amount of lift with use of aftermarket bumpers, wInch tire carriers. More lift will occur on vehicles in stock trim.
  • Springs retain the factory rake of the vehicle where the rear is higher than the front. Vehicle should sit level when loaded. Request one size shorter rear springs to level the vehicle out when unloaded.
  • Requires 16 inch or larger wheel diameter
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: 45568336453

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4.7 ★★★★★
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KCrowley
Lexington, US
★★★★★ 4
Smooth!
Color: Brown, Size: Mid Back, Color: Brown, Size: Mid Back
Good value and looks pretty good. Faux leather feels like Naugahyde. Should be durable since that's what boat seat are made of. Could use a bit more lumbar support, but overall quite comfortable. Wider than I expected (so it must be designed for us Americans.) Casters are fantastic. Far superior to traditional plastic casters. Because these are made of rubber, they are dead quiet and smoooooth rolling across the flooring. Took about 30 minutes to assemble. Lots of parts but the pictorial instructions were clear. I'd give it five stars, but I wish it had a bit more height adjustment. We'll see how it holds up, but so far I'm pretty pleased.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 29, 2025
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Buman
Bozeman, US
★★★★★ 5
Very pleased with my purchase
Color: Brown, Size: Mid Back
Easy to put together - instructions are good - excellent quality and the chair is comfortable. Far from being flimsy it's a heavy chair which rolls perfectly as needed. You won't find that many good chairs (if any!) at this excellent price. As always the ultimate question is: would I buy it again? The answer is YES, definitively. Great purchase.
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Reviewed in the United States on May 23, 2026
C
Verified Purchase
Craig
Carnegie, US
★★★★★ 5
superb, worth 2x the pricez
Color: Brown, Size: High Back
While this may appear to be an average run of the mill copycat sort of generic office chair, it's actually very comfortable with perfect lumbar support. Looks great, and the leather (or leather equivalent) feels durable. This sucker will last me in my WFH setup for years I do not doubt. Save yourself a few hundred bucks getting this versus some "premium" office chair... I doubt you'll notice much if any difference.
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Reviewed in the United States on May 5, 2026
L
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Lana M.
Belleville, US
★★★★★ 5
22 year old gamer approved.
Color: Black, Size: Mid Back
So far so good!! I bought this chair for my gamer son, he sat the springs out of his last one, so this one making it this long has me very pleased. It was easy to put together, and the quality is pretty notable, especially the wheels, super smooth rolling. It was definitely worth what we paid for it, and he finds it very comfortable, providing plenty of back support, and a stable seat for hours of gaming.
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Reviewed in the United States on May 10, 2026
S
Verified Purchase
Sam H
West Palm Beach, US
★★★★★ 3
The back of the chair is not supportive
Color: Brown, Size: Mid Back
Really nice casters that truly roll quietly. The faux leather is stitched well and sturdy. The only problem i have is that the back is not adjustable and gives 0 back support. The whole back of the chair is hollow inside so your lumbar gets no help. The seat is comfy but super wide like a lot of other reviews mentioned
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Reviewed in the United States on February 22, 2026

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