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Description
Synergy 8843-4000 4" Stage 3 Lift Kit Suspension SystemElevate the suspension system on your 2018 2023 Jeep Wrangler JL (4 Door) with the Synergy 8843 4000 4" Stage 3 Lift Kit Suspension System from GAP. Synergy MFG Suspension Systems use a synergistic approach, meaning the combined effect of the components is greater than the sum of the individual parts. The overall performance of the system is the most important factor when designing components to work together. Synergy MFG Suspension Systems are
Elevate the suspension system on your 2018-2023 Jeep Wrangler JL (4 Door) with the Synergy 8843-4000 4" Stage 3 Lift Kit Suspension System from GAP. Synergy MFG Suspension Systems use a synergistic approach, meaning the combined effect of the components is greater than the sum of the individual parts. The overall performance of the system is the most important factor when designing components to work together. Synergy MFG Suspension Systems are complete systems for your Jeep and include all necessary components for the lift height and performance advertised. Coil springs and shocks are two of the largest determining factors in ride quality and a mismatched system will never perform to its potential.
The Jeep JL Stage 3 Suspension System is a coil spring 4" lift designed around 37" tires for all models and 40" tires with Rubicon or aftermarket high clearance fenders. This system further builds off the Synergy Stage 2 System by adding a heavy-duty drag link and front track bar relocation bracket to correct the steering geometry, as well as their adjustable rear track bar and new stainless brake lines to deliver a complete and balanced suspension package with all the limits for maximum wheel travel properly addressed. This system is the apex of Synergy's JL Wrangler offerings and capable of extreme performance.
The Jeep JL Stage 3 Suspension System is a coil spring 4" lift designed around 37" tires for all models and 40" tires with Rubicon or aftermarket high clearance fenders. This system further builds off the Synergy Stage 2 System by adding a heavy-duty drag link and front track bar relocation bracket to correct the steering geometry, as well as their adjustable rear track bar and new stainless brake lines to deliver a complete and balanced suspension package with all the limits for maximum wheel travel properly addressed. This system is the apex of Synergy's JL Wrangler offerings and capable of extreme performance.
Features:
- Multi-Rate, Progressively Wound Coil Springs Increase Lift Height 4" Over Stock
- Longest In Class Free Length Prevents Coil Springs From Coming Unseated At Full Articulation
- All Adjustable Control Arms Are Included To Correct Caster, Pinion Angle, And Center The Axles
- Front And Rear Coil Springs Are All New And Have Been Designed Specifically For The JL Platform
- Bump Stop Spacing Is Adjustable From 2-4" In 1" Increments Without Having To Remove Any Hardware
- Coil Springs Are Guaranteed To Resist Bowing And Have A Lifetime Guarantee Against Sagging/Breakage
- 100 Percent Bolt On Components Assure An Easy, Trouble Free Installation With The Use Of Basic Hand Tools
- Coil Spring Block Height Has Been Designed Around Optimal Bump Stop Spacing For The Lift Height And Tire Size
- Coil Springs Are Unique Lengths For Each Corner Of The Vehicle To Compensate For Weight Distribution And Prevent Leaning
- Front And Rear Adjustable Bump Stop Spacer Kits Are Included To Provide The Necessary Clearance Required For Larger Tires
- Suspension Components Feature An Abrasion-Resistant Powder Coat Finish For Maximum Durability And Corrosion Resistance
- Control Arms Feature Our Maintenance Free Dual Durometer Bushings (DDB) Focusing On Performance, Flex, Longevity, And Ride Quality
- Industry First Closed And Ground Lower Ends Of The Front Coil Springs Ensure Perfect Fitment With The Included Front Lower Coil Spring Isolators
- Adjustable Front And Rear Track Bars Allow Centering Of The Both Axles, Reduce Lateral Shift In The Front End, And Eliminate Bind On Articulation
- Parking Brake Cable Bracket Secures The Parking Brake Cables When They Are Relocated Under The Rear Crossmember So They Don’t Impede Suspension Travel
- New Rear Sway Bar Links And Drop Brackets Are Added To The Rear To Allow Full Articulation Of The Rear Suspension And Maintain Compatibility With Stock Wheels
- Front Steering Correction Kit Combines Our Proven Heavy Duty Drag Link And Front Track Bar Bracket To Raise The Front Roll Center, And Correct The Steering Geometry
- Front Sway Bar Links With Quick Disconnects Allow Easy Disconnection Of The Front Sway Bar For Maximum Articulation Of The Front Suspension When Used Off Road
- Double Adjuster Assemblies Are Used For Easy Length Adjustment On The Vehicle And Pinch Bolts Are Used To Secure The Double Adjusters So There's No Fighting Jam Nuts
- Rear Track Bar Relocation Bracket Raises The Rear Roll Center To Reduce
Body Roll And Centers The Rear Axle While Preventing Drive Shaft
Interference With The Gas Tank
Benefits:
- No Maintenance Components
- Compatible With OEM Wheels
- Complete Bolt-On System For Easy Install
- Coil Spring Suspension System To Easily Fit Larger Tires
- Includes All Components Necessary To Get You On The Trail
- Greatly Improves Wheel Travel And Articulation Over Stock And Spacer Lifts
- Best In Class Ride Quality And Performance When Paired With Coil Spring Matched Synergy Tuned Shocks
- Corrects Suspension Geometry To Center Front And Rear Axles And Fine Tune Alignment And Pinion Angles
- Includes Front Sway Bar Quick Disconnects For Easy Disconnection Of The Front Sway Bar For Off Road Use
Improvements from the Synergy MFG Stage 2 System:
Adds Front Steering Correction Kit To Raise Roll Center And Improve Steering GeometryAdds Adjustable Rear Track Bar For Increased Articulation And To Re-Center Axle
Includes:
(1) 8863-40 Front Lift Coil Springs, 4-Inch Lift
(1) 8864-40 Rear Lift Coil Springs, 4-Inch Lift
(1) 8057-10 Snap-Lock Bump Stop Spacer System
(1) 8858-40 Rear Bump Stop Extension, 4.0 Tall
(1) 8859-11 Front Sway Bar Links
(1) 8861-11 Rear Sway Bar Links
(1) 8855-11 Front Track Bar Relocation Bracket
(1) 8800-01 Heavy-Duty Drag Link
(1) 8851-01 Adjustable Front Lower Control Arms
(1) 8853-01 Adjustable Front Upper Control Arms
(1) 8052 Adjustable Rear Lower Control Arms
(1) 8854-01 Rear Upper Adjustable Control Arms
(1) 8875-01 HD Adjustable Front Track Bar
(1) 8856-01 Rear Track Bar Relocation Bracket
(1) 8862-01 HD Adjustable Rear Track Bar
(1) 8818-01 Parking Brake Cable Relocation Bracket
(1) 8864-40 Rear Lift Coil Springs, 4-Inch Lift
(1) 8057-10 Snap-Lock Bump Stop Spacer System
(1) 8858-40 Rear Bump Stop Extension, 4.0 Tall
(1) 8859-11 Front Sway Bar Links
(1) 8861-11 Rear Sway Bar Links
(1) 8855-11 Front Track Bar Relocation Bracket
(1) 8800-01 Heavy-Duty Drag Link
(1) 8851-01 Adjustable Front Lower Control Arms
(1) 8853-01 Adjustable Front Upper Control Arms
(1) 8052 Adjustable Rear Lower Control Arms
(1) 8854-01 Rear Upper Adjustable Control Arms
(1) 8875-01 HD Adjustable Front Track Bar
(1) 8856-01 Rear Track Bar Relocation Bracket
(1) 8862-01 HD Adjustable Rear Track Bar
(1) 8818-01 Parking Brake Cable Relocation Bracket
Wheel and Tire Fitment:
Recommended tire size is limited by fender clearance. With higher clearance fenders or trimmed fenders, larger tires may be fitted. Bump stop spacing should be matched to the collapsed length of the shocks. Mismatched bump stop spacing and shocks will limit the available travel from the system.Notes:
Synergy MFG coil springs lift the vehicle the advertised height over stock based on a fully loaded JL Rubicon. Other JL models will see more lift over stock. These coil springs do not lift taller than advertised. The stock rake based off the Rubicon model is kept to retain its load carrying capacity. If you prefer the vehicle to sit level when unloaded, Synergy recommends adding a small coil spacer to the front (up to 3/4-inch without affecting up travel or causing coil bind, 8017-075).Synergy is not responsible for maintaining finish of products. Environmental factors will affect rate of corrosion and wear for items advertised to be corrosion resistant. Synergy recommends using protective coatings for all items that will see extended outdoor and off-road use. Synergy has had great experience with the Fluid Film product and recommend it and similar products for any items susceptible to damage from corrosion. It is great for keeping double adjuster assemblies working like new and protecting shock bodies from the elements.
Additional Specifications:
Lift Height: 3-inches over stock Rubicon, 3.75-inches over stock Sport/Sahara
Wheel Travel: Capable of 10.2-inches Front, 11" Rear (+2.7-inches front and +2.4-inches rear over stock Rubicon) when used with Synergy Tuned Shocks and optimal bump stop spacing
Tire Size: Up to 37-inch Rubicon, 35-inch Non-Rubicon
Wheel Travel: Capable of 10.2-inches Front, 11" Rear (+2.7-inches front and +2.4-inches rear over stock Rubicon) when used with Synergy Tuned Shocks and optimal bump stop spacing
Tire Size: Up to 37-inch Rubicon, 35-inch Non-Rubicon
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.3 ★★★★★
Based on 2383 reviews
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Product Reviews
★★★★★ 5
Coop Home Goods Eden Bed Pillow Queen Size
Team Name: Eden, Size: Queen, Color: Classic
I am very satisfied with the Coop Eden Bed Pillow.
It is clearly a high-quality product that is well worth the investment.
Here are a few reasons why I highly recommend it:
Fast Shipping & Great Packaging: The pillow arrived very quickly. It was packed beautifully in a box that was both aesthetic and very functional.
Initial Scent , There was a slight 'new pillow' scent upon opening, which is totally normal. I let it air out for a few hours and it was completely gone.
Fully Customizable Comfort: The pillow itself is incredibly comfortable and looks great. The best part is the ability to add or remove fill to reach your exact preferred loft. It even comes with an extra bag of fill, so you can make it firmer or softer depending on your needs. Being able to determine the exact volume is a game-changer.
Easy Maintenance: It comes with a lovely outer cover that is removable and washable, which is a fantastic and practical feature.
Overall, you can really feel the quality of this pillow. If you are looking for a customizable, premium sleeping experience, this is definitely the one to get!
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Amazing pillow - adjustable filling
Team Name: Eden, Size: King, Color: Crescent
This pillow is AMAZING. My wife loves it. The crescent shape is cool and unique and enables your neck, back, and shoulders to lay better on the bed. My wife is a back sleeper and sometimes side sleeper. What’s amazing about this is you can adjust the quantity of the filling to your preference. It came with an extra bag if you want to fill it with more. We ended up taking a fair bit out. The card it comes with was super helpful illustrating how your head should rest on it, which showed my wife she had to take some out for her neck to be flatter. It seemed too firm at first so taking out the filling helped. The material inside is super fluffy, light, and airy- it’s extremely soft! As soft as down or other material. I mean this is an amazing pillow. It is luscious and super comfy. It is expensive but worth it.
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Reviewed in the United States on April 26, 2026
★★★★★ 5
I can't sleep without this pillow.
Team Name: Eden, Size: King, Color: Classic
This review is for the King size, adjustable Eden pillow. I bought the original years ago and somehow lost it when I moved recently, so I bought the Eden to replace it. Years ago, these pillows were not adjustable but I loved it anyway and was truly upset when I discovered it was missing. I actually lost sleep over it. When I found out they're adjustable now, I about lost my mind over the possibilities. In fact, I love the adjustable, Eden version so much that I bought another one. So yeah, I have purchased this pillow 3 times and have not been happier with any other pillow.
Bad news first. The odor.
You should know that they claim the foam is packed "fresh." This means there WILL be an odor when you receive it because it hasn't had the opportunity to air out. You'll have to do that yourself. Maybe they'll find a way in the future to "pre-air" the foam they use. For now, just accept that it's WORTH THE WAIT and really not a big deal. Don't return your pillow just because of the odor. It WILL go away and you don't want to miss out on this fantastic pillow. They suggest letting it sit for 24 hours or throw it in the dryer. Neither of these methods are long enough, in my opinion, but please be patient. I have experience with 3 of these pillows now and tried different techniques.
This is what works best for me: Upon arrival, I immediately remove the outer pillowcase and set aside. Over the course of 48 hours, I let it sit on the bed in my guest room with the ceiling fan on and I "fluff" it 3 or 4 times each day. (I will describe proper fluffing technique for shredded foam later) Then I throw it in the dryer on low for a full cycle. Then put the case back on and it's done! You'll never have to worry about that again and soon you won't even remember having to do it.
Now that THAT'S out of the way...
I love that these pillows are adjustable now. They really packed in the foam on the king size! I'm not kidding. There was so much foam in my pillows that they, frankly, were too heavy and way too firm for me. I've seen some negative reviews to the contrary. Maybe since then, they've increased the amount of foam they include (they should keep that up, if that's what happened). That's not how I like my pillows but some folks might be into that so I'm glad they put enough in there for those who need a lot of support. They do include 1/2 pound of extra foam in case you want a true, solid-as-a-rock feel. I do not. I'm a stomach and side sleeper, who likes more "squish" to my pillows, so I ended up removing so much foam from my 2 king size pillows that I have enough to make 2 standard sizes with the same squish factor. Not kidding. I went to the Coop website and purchased 2 standard liners and cases that I'm going to stuff with the excess foam and use on my guest bed. I anticipate some of my guests asking where I got the awesome pillows. :)
As we all know, memory foam holds heat too well and some foams will kick you right out of bed because you just can't stand to be that hot anymore. I did experience heat retention in the "original" that I had for years. I flipped the pillow over to get the cool side. I assumed all memory foam was like that so I put up with it. I don't get that at all with the Eden version. I'm a hot sleeper but I haven't had any issue with the Eden at all. The Eden has the blue foam in it that's gel-infused. I don't use anything extra or fancy to keep them cool. The foam is in the provided liners and pillowcases and I cover those with normal, cotton pillowcases.
I did see a couple reviews that claim their pillows went flat after a while. I'm confused by this. I had my first pillow for years and never experienced any change in texture. As with ANY shredded memory foam pillow, they need to be "fluffed" every now and then. In fact I fluff all of my pillows occasionally, regardless of the stuffing used (I have a variety of textures on my bed). But regardless, shredded memory foam pillows don't go flat. It's just not a thing. If you feel like it's flat, fluff it. Get rough with it. The shapes of the shreds can, over time, start to fit together like puzzle pieces and can become compact in some areas in the pillow. Maybe this is what creates the illusion that it's flat? "Fluffing" a shredded foam pillow involves breaking all the pieces up so they can move independently again. To achieve this, you have to grab several areas of the pillow with both hands so you have clumps of foam in your hands and then sort of jostle everything around in there, breaking up all the chunks. I usually grab and use the same motion I would use to bang cymbals together and then repeat all over the pillow until it feels like everything is separated again. I find this technique to be most effective when I grab around the edges. This takes only 5-8 seconds to accomplish and is completely normal maintenance for a shredded foam pillow.
Final thought: Shredded memory foam pillows are not for everyone because comfort is subjective. We all sleep differently and have different needs. After reading through some of the negative reviews, I've determined that some of them HAD to have been left by people who have never used a shredded foam pillow before and have determined it's not for them. COOP has a generous 100 night, no questions asked refund policy, so it doesn't hurt to try it. I don't view those reviews as a poor reflection of this company's products, but rather that the consumer tried something once and decided shredded foam pillows are not for them. I do have some experience with shredded foam pillows and can tell you that the Eden is, hands down, the best and highest quality that I've found on the market.
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Reviewed in the United States on November 16, 2020
★★★★★ 4
Great Pillow and Highly Adjustable
Team Name: Eden, Size: King, Color: Classic
I have used a Claritin Down Alternative Pillow in the past, but they are no longer available. I am very picky with my pillows and have had a difficult time finding one that fits my needs. I decided to purchase the Coop Pillow despite the high cost. After several weeks of use, I am glad I found this one. The pillow has just the right amount fluff and support. I like that it comes with extra fill that I can use to adjust the its firmness, but I didn't need it. I'm a side sleeper and it was great right out of the box. The outer shell of the pillow is soft and very good quality. I am so glad that I found an alternative to my Claritin Pillow.
The reason I only gave it 4 stars are for two simple reasons. First, the cost. This product is very comfortable, but there is no magic to its construction. The fill appears to be just finely shredded memory foam. The extra fill doesn't even come in a storage bag. It is wrapped in plastic. If you open it, you will need to find a separate storage container to put the excess fill. For this price, I would expect more. Second, this pillow is advertised as being "cool" to sleep on. However, I find it warmer than other pillows to the point it seems to trap heat. My wife has the standard Coop Pillow and I feel that it is "cooler" than this version. Of course, this is very subjective and you will need to test for yourself. Overall, this is a great pillow that has endless adjustability due to the extra fill provided. A pillow for everyone!
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Reviewed in the United States on May 22, 2025
★★★★★ 5
Coop Home Goods Eden Adjustable Memory Foam Pillow with Cooling Gel, Bam
Team Name: Eden, Size: Queen, Color: Classic, Team Name: Eden, Size: Queen, Color: Classic
Experience customizable comfort and proper neck support
The Coop Home Goods Eden pillow is designed with shredded memory foam infused with cooling gel to provide balanced support and pressure relief for your head and neck.
Cooling gel memory foam for a fresher sleep
The gel-infused foam promotes airflow and heat dissipation, helping you stay cool throughout the night.
Fully adjustable loft and firmness
Add or remove filling to customize the height and firmness to match your sleeping position, whether you sleep on your side, back, or stomach.
Premium bamboo-derived cover
The soft, breathable cover made from bamboo-derived viscose and polyester is removable and machine washable for easy cleaning.
Hypoallergenic and certified safe materials
Made with CertiPUR-US and GREENGUARD Gold certified foam, resistant to dust mites and harmful chemicals.
Ideal for neck pain relief and better sleep quality
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Reviewed in the United States on January 31, 2026