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RockJock Rear Coil Springs, JL, 4 dr. (EcoDiesel and 392), 3.5 in. Lift, Pair

RockJock Rear Coil Springs, JL, 4 dr. (EcoDiesel and 392), 3.5 in. Lift, Pair
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399.00 399.0 USD 399.00

399.00

Not Available For Sale

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Fitment guarantee Ships from Orem, UT 4–8 hr install
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https://core4x4.com/web/image/product.template/24380/image_1920?unique=2d5d26f

RockJock Rear Coil Springs, JL, 4 dr. (EcoDiesel and 392), 3.5 in. Lift, Pair

RockJock Rear Coil Springs, JL, 4 dr. (EcoDiesel and 392), 3.5 in. Lift, Pair
SKU: RJ-144401-101
Pick your vehicle to confirm fit

399.00 399.0 USD 399.00

399.00

Not Available For Sale

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Lifetime warranty Made in USA

Made in USA Orem, Utah
Lifetime Guarantee Unconditional
10 Colors In-house powder coat
Fully Adjustable 0-6" of lift
3 X-Series Options Only Core 4x4

This pair of RockJock rear coil springs will provide 3 1/2 inches of lift in JL Wrangler Unlimited applications that feature the EcoDiesel or 392 Hemi powertrains. These springs directly replace factory springs and are designed to work with RockJock Johnny Joint suspension systems or other manufacturer's lift kits and provide improved ride quality and height control. Finish is gloss black powder coat. Extensive research was done by RockJock to develop the perfect spring rate and quality of the coil springs. The results: they provide the best in comfortable ride and excellent performance off-road. If you need help choosing the correct springs for your Jeep - just call the RockJock sales staff!

Make Model Submodel Years
Jeep Wrangler 2018 - Present

Vehicle Jeep Wrangler JL / JLU (18–Present)
Brand RockJock
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Reviews of Core 4x4

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5.0
132 reviews
5
97%
4
2%
3
0%
2
1%
1
0%
BC
Brad C Mar 24, 2021
Google
Outstanding experience! I asked Core to build me a set of custom control arms that were larger/heavier than they normally build. They gladly accepted the challenge and turned out an expertly crafted and super strong product ahead of schedule. Fit and finish are excellent. Spence and Cameron were a pleasure to work with every step of the way. And all of this for a very reasonable price. I highly recommend these guys!
Review photo 1
A
Aaron Mar 23, 2024
Google
I have recently come to know Core 4x4 when I purchased a Jeep XJ and was looking for a place that had dedicated XJ suspension and components. Here is what makes them different than most other shops. All of their components are top shelf quality and they back it up if you break any of it. I was able to see their shop when I picked up an order locally and was impressed with their attention to detail and how they assemble and powder coat each part. I had an issue with a shackle and needed the threaded shaft to be shorter. I called in and talked to Kaden and he told me to come by and they would shorten it for me. When I got there, Kaden and Spencer (the owner) met me and talked about options and proceeded to make the right adjustments to fit my XJ. Told me if anything changes in the future and I need additional length, they would take care of me. So what really sets them apart from others is their Customer Service. Try calling in to any other Jeep suspension or part shop and see how they treat you. Been there - done that. Will continue to do business with Core and their team. Getting that kind of service for just a shackle has me thinking I may need to replace my JT components with Core's. Thanks Guys for being helpful good humans!
TH
Todd Hume Jan 22, 2026
Google
Their products are great but the service is even better!! Thanks Korby.
EL
Eric Labrum May 27, 2025
Google
Best customer service I have ever experienced. They are my go to source do to quality and service
ZA
Zen Asher Mar 23, 2025
Google
The quality and durability of the arms are the best. They are super heavy duty. And lifetime warranty is crazy
SH
Shawn Hooten Apr 27, 2025
Google
Great products, shipped the next day during a big sale event. Core 4x4 gets it right and gets it done! Thank you all.
BW
Brian Wadsworth Jun 26, 2025
Google
Amazing product! Shipping was quick, packaging was great and support was outstanding!!
OJ
Oldgreg jr Mar 23, 2025
Google
Good company, they offer well built parts and Great customer service. I had a couple of hang ups with my control arms that I purchased, they were very easy to work with and found the solution to make them work.
MR
Melanee Raynes Mar 25, 2019
Google
Awesome product and service! I even got some of their swag because it looked pretty darn good. I will definitely be going back and would suggest this business to others looking for quality control arms. Buy local!
CM
Craig MacIver May 27, 2025
Google
Got the CAMP version of adjustable control arms and track bars for our 03 TJ with a 3” lift and 33x10.5 KO 2’s. Super beefy bars, great fit and adjustability. Friendly advice and support from Korby at CORE 4X4. Good follow up as well. The ride quality is great as well as the handling. I think it all looks pretty good as well.
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Specifications

Vehicle Jeep Wrangler JL / JLU (18–Present)
Brand RockJock
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