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Bump Stops
RockJock JL/JT and JK Adjustable Front Upper Bump Stops, Billet Aluminum, Complete w/ Steel Shims, Hardware, Wrench. Height Adjustment Range: 1.89 in. - 3.15 in.
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322.00 322.0 USD 322.00

322.00

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Fitment guarantee Ships from Orem, UT 4–8 hr install
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RockJock JL/JT and JK Adjustable Front Upper Bump Stops, Billet Aluminum, Complete w/ Steel Shims, Hardware, Wrench. Height Adjustment Range: 1.89 in. - 3.15 in.

RockJock JL/JT and JK Adjustable Front Upper Bump Stops, Billet Aluminum, Complete w/ Steel Shims, Hardware, Wrench. Height Adjustment Range: 1.89 in. - 3.15 in.
SKU: RJ-107101-101
Pick your vehicle to confirm fit

322.00 322.0 USD 322.00

322.00

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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

RockJock Adjustable Front Bump Stops for JL Wranglers and JT Gladiators, as well as JK Wranglers are a completely different take on the concept of bump stops! So unique in fact that they were awarded SEMA's 2023 Best New Off-Road/4-Wheel Drive Product of the year! In high articulation situations, axle housing mounted bump stops end up rotating inward toward the center of the vehicle, often missing the upper bump stop entirely, see diagram in the photo gallery). By lowering the bump stop, and being able to adjust it’s length, you are able to guarantee bump stop contact with the bump stop pad on the axle when and where you need it. Our adjustable kit features billet aluminum components and 5/16 in. thick steel shims that are able to be added and subtracted for fine tuning - while the bump stop assemblies are on the vehicle. You simply put a socket on the upper bolt to hold it in place, loosen the bump stop body with the supplied spanner wrench, add or subtract bump stop shims as needed and then tighten the assembly back up! The vehicle's factory yellow jounce bumpers are retained and relocated by reinserting them back into the bottom of the new aluminum RockJock bump stop bodies. This provides factory feel when the bump stops make contact. Finish is clear anodize on the aluminum and zinc plating on the spacers and bolts.

Make Model Submodel Years
Jeep Gladiator 2020 - Present
Jeep Wrangler 2007 - 2018
Jeep Wrangler 2018 - Present

Vehicle Jeep Gladiator JT (20–Present) or 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%
JM
Jason Mitchell Dec 8, 2025
Google
Installed the full kit on my XJ. Ride quality is night and day better than what I had before. The articulation on the trail is insane. These guys know what they are doing. Already recommended Core 4x4 to everyone in my club.
RM
R2d2 Movi78 Feb 21, 2026
Google
I’m extremely impressed with Core 4x4. The quality of their parts is outstanding — everything feels solid, well‑built, and engineered with real attention to detail. Shipping was fast and everything arrived perfectly packaged. Their customer service is just as good as their products: responsive, helpful, and genuinely committed to making sure you get exactly what you need. Overall, a top‑tier experience. I’ll definitely be buying from them again. Specially thank you Mr. Linscomb from Core 4x4. Arturo M.
NP
Norb Pranger Oct 24, 2025
Google
Not sure where to start, Products or Service or Warranty. Products: I found Core4x4 through a very respected YouTuber in the Jeeping community. I purchased an entire set of Core4x4 Control Arms three years ago and have beat the daylights out of them and they are still in great condition. Now, I purchased another Jeep, this time for my daughter and bought yet another set of Control Arms because I know that these things can take a beating and stand up to it. I plan on replacing more parts on this TJ and my JL and will continue to buy from Core4x4. Service: This isn't some huge name conglomerate that treats you like you're just another customer. They are quick with responses and will always make things right should something be a problem. Oh and the quickness in which they ship their products is unmatched. I bought these CAs for my TJ on Thursday, I received them on Monday. Most other manufacturers will tell you weeks, they had them to me in 2 shipping days. Warranty: Seriously, a lifetime warranty? Yes please. Nothing more to say. I can't say enough about how great of a company this is. I've even spoken to the owner through email a few years back on some questions that I had. Support small American built businesses. P.S. Core 4x4, feel free to make me an ambassador and send me some swag :) .
DS
Dana Smith Jul 26, 2025
Google
Excellent, strong, and durable products—perfect for both on-road and off-road applications. The customer service is outstanding—friendly, knowledgeable, and extremely helpful with understanding installation and ensuring I got exactly what I needed. I would definitely order again. Top-notch company with high-quality products made right here in the U.S.A.
Review photo 1 Review photo 2 Review photo 3
DW
Darin Wuebbels May 27, 2025
Google
Thanks for the fabulous customer service. Your products and customer service are first class. I highly recommend these guys. Excellent experience.
Review photo 1
A
Adam Oct 24, 2025
Google
I couldn't have been more excited for the initial unboxing of these new Core 4x4 UCA's! They appear to be so well built and just a true quality product. Installation was a breeze and the initial testing with the forklift appears to have given me some additional flex with less binding on the rest of the components now that the geometry is back properly aligned. Time will tell how they hold up on my near future off-road adventures but I don't have any doubt that they are up to the task!
Review photo 1 Review photo 2 Review photo 3 Review photo 4
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.
Review photo 1 Review photo 2 Review photo 3 Review photo 4
DT
Dean Tk421 Feb 21, 2026
Google
I purchased the Jeep WJ control arms Camp series over a year ago. Very pleased and impressed. Easy installation and solid build. Bracket broke for rear upper control arm, they redesigned it to be more robust and sent me a new one with hardware, honoring their guarantee!
JL
John Luna Nov 23, 2025
Google
Great team, and help to support my jeep and provide best stuffs
RD
Reagan D'mello Dec 23, 2025
Google
Love the product. Excellent customer support 👍🏽 …

Specifications

Vehicle Jeep Gladiator JT (20–Present), Jeep Wrangler JL / JLU (18–Present)
Brand RockJock
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