JKS 4.5" Lift Kit · J-Krawl Wrangler JL 4-Door
- Rear lift 4"
- Shocks included
- Lift 4-5.5"
- Install 5-7hrs
- Difficulty Moderate
Questions about fitment? Live chat or call 866-235-4715
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Optional add-ons
Steering Stabilizers
Add-ons selected:
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- Free shippingMost orders $500+
- 30-day returnsSee policy
- Warranty supportWe work with the maker
Questions about fitment?
Talk to a TRU specialist
We’ll help you verify fitment before you buy.
Veteran-owned · Austin, Texas · Mon–Fri 9:30a–11:00a & 1:00p–5:30p CT
Important notes before you order
- Aftermarket drive shaft is required.
- Drag link flip is required for steering correction. Additional heavy duty steering components are recommended.
- A strong steering stabilizer is recommended. In our testing there was a lot of variation between Jeeps in how they react to tire size, lift height, factory steering components and worn parts. Increasing caster and toeing in the tires can help, but sometimes a strong stabilizer is required to prevent steering wheel shimmy in some vehicles.
TRU specialist notes
From the Trucks R Us fitment and install team, beyond the manufacturer's information.
- Plan for a professional wheel alignment after installing any lift or leveling kit.
- Going to bigger tires as well? Speedometer recalibration may be needed, and some tire and wheel combinations need trimming. Check the recommended wheels and tires, or ask us before you order.
Specifications
| Brand | JKS Manufacturing |
|---|---|
| Part number | JSPEC225FRS |
| UPC / GTIN | 810163873294 |
| Front Lift Method | Coil Spring |
| Rear Lift Method | Coil Spring |
| Rear Lift Height | 4" |
| Shocks Included | Yes |
| Lift Height | 4-5.5" |
| Installation Difficulty | Moderate |
| Installation Time | 5-7hrs |
| Install time | 5-7hrs |
| Difficulty | Moderate |
California Proposition 65 warning applies to this product. www.P65Warnings.ca.gov
What's in the box
| Qty | Part | Description |
|---|---|---|
| — | — | Included with every option |
| 1 | JSPEC1450 | 2018-2026 Jeep Wrangler JL J-Spec 4.5" Main Box Kit |
| — | — | Shocks – FOX 2.0 Adventure Series |
| 2 | FOX98450327 | FOX 2.0 IFP Shock | Adventure Series | Vehicle Specific | 30.06 x 18.46 x 2 EB1/EB1 |
| 2 | FOX98450328 | FOX 2.0 IFP Shock | Adventure Series | Vehicle Specific | 31.06 x 18.96 x 2 EB1/EB1 |
| — | — | Shocks – FOX 2.0 Performance Series |
| 2 | FOX98524181 | FOX 2.0 IFP Front Shock | 4.5-6 Inch Lift | Performance Series | Jeep Wrangler JL (18-27) |
| 2 | FOX98524182 | FOX 2.0 IFP Rear Shock | 4.5-6 Inch Lift | Performance Series | Jeep Wrangler JL (18-27) |
| — | — | Shocks – FOX 2.5 Performance Elite |
| 1 | FOX88326052 | FOX 2.5 Reservoir Front Shocks Adjustable | Performance Elite | 4.5-6 Inch Lift | Wrangler JL (18-27) |
| 1 | FOX88326056 | FOX 2.5 Reservoir Rear Shocks Adjustable | Performance Elite | 4.5-6 Inch Lift | Wrangler JL (18-27) |
| — | — | Shocks – FOX 3.0 Factory Race Series |
| 1 | FOX88326077 | FOX 3.0 Internal Bypass Reservoir Front Shocks Adjustable | Factory Race | 3.5-4.5 Inch Lift | Jeep Wrangler JL (18-27) |
| 1 | FOX88326078 | FOX 3.0 Internal Bypass Piggyback Rear Shocks Adjustable | Factory Race | 3.5-4.5 Inch Lift | Jeep Wrangler JL (18-27) |
| — | — | Standard Rate Coils (either bushing option) |
| 1 | JSPEC1451 | 4.5" Lift Coil Spring Pair | Front | Dual Rate | Wrangler JL |
| 1 | JSPEC1459 | 4.5" Lift Coil Spring Pair | Rear | Dual Rate | Wrangler JL |
| — | — | Heavy Duty Rate Coils (either bushing option) |
| 1 | JSPEC1452 | 4.5" Lift Coil Spring Pair | Front | Dual Rate | Wrangler JL |
| 1 | JSPEC1458 | 4.5" Lift Coil Spring Pair | Rear | Dual Rate | Wrangler JL |
| — | — | Flex-End control arms (either spring rate) |
| 1 | JKS1616 | Adjustable Control Arms | Front Upper | Wrangler JL and Gladiator JT |
| 1 | JKS1625 | Adjustable Control Arms | Front Lower | Wrangler JL and Gladiator JT |
| 1 | JKS1661 | Adjustable Control Arms | Rear Lower | Wrangler JL |
| 1 | JKS1666 | Adjustable Control Arms | Rear Upper | Wrangler JL |
| — | — | Rubber Bushing control arms (either spring rate) |
| 1 | JKS1632 | J-Link Adjustable Control Arms | Front Lower | Wrangler JL & Gladiator JT |
| 1 | JKS1634 | J-Link Adjustable Control Arms | Front Upper | Wrangler JL & Gladiator JT |
| 1 | JKS1636 | J-Link Adjustable Control Arms | Rear Lower | Wrangler JK/JL |
| 1 | JKS1639 | J-Link Adjustable Control Arms | Rear Upper | Wrangler JK & JL |
| — | — | APEX Drag Link Flip Kit option |
| 1 | APEXKIT119-JKS | 2018-2025 Jeep Wrangler JL / 2021-2025 Jeep Gladiator JT Drag Link Flip - High Clearance |
Features
- Features heavy-duty J-Flex upper and lower control arms to improve strength and correct geometry.
- Front adjustable track bar and rear track bar bracket.
- Front sway bar quicker disconnects.
- Front and rear bump stop extensions.
Fitment
| Years | Vehicle |
|---|---|
| 2018-2019 | Jeep Wrangler (Gas models only) |
| 2021 | Jeep Wrangler: 80th Anniversary, Freedom, Islander (Gas models only) |
| 2026 | Jeep Wrangler: 85th Anniversary Edition, Unlimited Rubicon Reign, Unlimited Rubicon Whitecap, Willys '41 |
| 2023 | Jeep Wrangler: Freedom, High Altitude, High Tide, Sahara Altitude, Sahara High Altitude, Sport Altitude |
| 2020 | Jeep Wrangler: Rubicon Deluxe, Unlimited Rubicon Deluxe |
| 2023-2027 | Jeep Wrangler: Rubicon, Sahara, Sport, Sport S, Willys |
| 2020-2022 | Jeep Wrangler: Rubicon, Sport, Sport S (Gas models only) |
| 2024-2027 | Jeep Wrangler: Rubicon |
| 2021 | Jeep Wrangler: Unlimited 80th Anniversary, Unlimited Freedom, Unlimited Islander |
| 2021-2022 | Jeep Wrangler: Unlimited High Altitude, Unlimited Sahara Altitude, Unlimited Sahara High Altitude, Unlimited Sport Altitude, Unlimited Willys, Unlimited Willys Sport |
| 2022 | Jeep Wrangler: Unlimited High Tide |
| 2018-2019 | Jeep Wrangler: Unlimited Moab |
| 2018-2026 | Jeep Wrangler: Unlimited Rubicon, Unlimited Sahara |
| 2018-2022 | Jeep Wrangler: Unlimited Sport, Unlimited Sport S |
| 2024-2026 | Jeep Wrangler: Unlimited Willys |
| 2023-2024 | Jeep Wrangler: Willys Sport |
| 2021-2022 | Jeep Wrangler: Willys, Willys Sport (Gas models only) |
Use the fit check above with your truck selected, or ask a specialist if your trim isn't listed.
Recommended wheels & tires
- 37 x 12.5 with 17 x 8 and 5 in. Backspace
- 40 x 13.5 with 17 x 8 and 4.5 in. Backspace
- (Trimming may be required)
Installation
- Estimated install time5-7hrs
- DifficultyModerate
Free install support from the Trucks R Us tech team, for you or your shop.
Overview
For Jeep owners who demand maximum off-road performance and suspension adjustability, the JKS J-Krawl 4.5” Lift Kit is the ultimate high-articulation upgrade for the 2018–2025 Jeep Wrangler JL. This system is built around a full set of JKS heavy-duty J-Link adjustable control arms, available with either OEM-style rubber bushings or advanced Flex Ends that promote superior suspension articulation. The J-Krawl system offers precise tuning of caster, pinion angle, and wheelbase—ideal for aggressive tire setups and serious trail use. Paired with JL-specific dual-rate coil springs, this kit provides a smooth, controlled ride on-road while delivering maximum off-road flex and axle stability.
To maintain proper suspension geometry and handling, the kit includes a front adjustable track bar and rear track bar bracket to keep the axles centered, along with extended sway bar links for improved articulation. Bump stop extensions are included to prevent over-compression, while brake line relocation brackets ensure safety and functionality at full suspension travel. Designed for Jeepers who crawl technical terrain and demand a fully tunable suspension setup, this kit supports up to 37" tires and is compatible with both stock and aftermarket driveshafts (aftermarket recommended for extreme off-road use).
Whether you're building a weekend crawler or a dual-purpose overland rig, the JKS J-Krawl 4.5” Lift Kit gives you the control, clearance, and confidence to push your Wrangler to its limits. If you're serious about suspension performance and full adjustability, this is the kit that delivers.
Questions
Will this fit my truck?
Select your truck at the top of the page and the fit check will confirm it. If your exact trim is not listed, call 866-235-4715 or live chat and a fitment specialist will check it before you order.
Do you help with installation?
Yes. Our technical team helps you or your shop with installation and troubleshooting after delivery, on top of the manufacturer’s support.
What if the part has a problem?
We work the warranty claim with the manufacturer on your behalf, within the manufacturer’s warranty policy.
Can I return it?
Most items can be returned within 30 days. See our return policy for details.
Do I need an alignment after installing?
Yes. Any lift or leveling kit changes suspension geometry, so get a professional alignment after installation.
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About JKS Manufacturing
Since 1989, JKS Manufacturing has developed some of the world’s most widely used and respected products for Jeep vehicles. It all started when we pioneered the original Quick Disconnect brand of quick-release sway bar disconnects. Since then our product range... Shop all JKS Manufacturing