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JKS ManufacturingPart # JSPEC171FRS

JKS 3.5" Lift Kit · J-Krawl Gladiator JT

Regular price $8,936.55
Regular price B2B price $8,936.55
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  • Lift 2-3.5"
  • Install 6 hrs
  • Difficulty Difficult
Read the important notes before ordering

Questions about fitment? Live chat or call 866-235-4715

Shock Option
Control Arm Bushing Option

Complete your build

Optional add-ons

Steering Stabilizers

  • SKU FOX98302148Details
  • SKU FOX98502127Details
  • Free shippingMost orders $500+
  • 30-day returnsSee policy
  • Warranty supportWe work with the maker
View full details

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

  1. Diesel models may achieve up to 1" less lift height
  2. Kit does not work with the Mojave model
  3. Lifted 2026 models with 37" all-terrain or mud-terrain tires may experience to the intrusion tray at full suspension droop near passenger steering lock. After kit installation, cycle the suspension to verify tire and steering clearances to the tray.

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

BrandJKS Manufacturing
Part numberJSPEC171FRS
Lift Height2-3.5"
Installation DifficultyDifficult
Installation Time6 hrs
Install time6 hrs
DifficultyDifficult

California Proposition 65 warning applies to this product. www.P65Warnings.ca.gov

What's in the box

QtyPartDescription
——Included with every option
1JSPEC1257Coil Spring Box Kit: 2020-2026 Jeep Gladiator JT - 1.5" Rear Coil Springs
1JSPEC13042020-2026 Jeep Gladiator JT J-Krawl Main Box Kit
1JSPEC1352Coil Spring Box Kit: 2018-2026 Jeep Wrangler JL / 2020-2026 Jeep Gladiator JT - 3.5" Front Coil Springs - HD
——FOX 3.0 Factory Race Series / Flex End (JSPEC171FRS)
1FOX88326077FOX 3.0 Internal Bypass Reservoir Front Shocks Adjustable | Factory Race | 3.5-4.5 Inch Lift | Jeep Wrangler JL (18-27)
1FOX88326081FOX 3.0 Remote Reservoir Rear Shocks Adjustable | Factory Race Series Internal Bypass | 2-3 Lift | Gladiator JT
1JKS1616Adjustable Control Arms | Front Upper | Wrangler JL and Gladiator JT
1JKS1625Adjustable Control Arms | Front Lower | Wrangler JL and Gladiator JT
1JKS1662Adjustable Control Arms | Rear Lower | Gladiator JT
1JKS1667Adjustable Control Arms | Rear Upper | Gladiator JT
——FOX 2.0 Performance Series / Flex End (JSPEC171KFP)
2FOX98524179FOX 2.0 IFP Front Shock | 3.5-4 Inch Lift | Performance Series | Jeep Wrangler JL (18-27)
2FOX98524219FOX 2.0 IFP Rear Shock | 0-1.5 Inch Lift | Performance Series | Jeep Gladiator JT (20-26)
1JKS1616Adjustable Control Arms | Front Upper | Wrangler JL and Gladiator JT
1JKS1625Adjustable Control Arms | Front Lower | Wrangler JL and Gladiator JT
1JKS1662Adjustable Control Arms | Rear Lower | Gladiator JT
1JKS1667Adjustable Control Arms | Rear Upper | Gladiator JT
——FOX 2.5 Performance Elite / Flex End (JSPEC171PES)
1FOX88326051FOX 2.5 Front Shocks w/ DSC Reservoir Adjuster | 3.5-4 Inch Lift | Performance Elite Series | Jeep Wrangler JL (18-27)
1FOX88326074FOX 2.5 Rear Shocks w/ DSC Reservoir Adjuster | 2-3 Inch Lift | Performance Elite Series | Jeep Gladiator JT (20-23)
1JKS1616Adjustable Control Arms | Front Upper | Wrangler JL and Gladiator JT
1JKS1625Adjustable Control Arms | Front Lower | Wrangler JL and Gladiator JT
1JKS1662Adjustable Control Arms | Rear Lower | Gladiator JT
1JKS1667Adjustable Control Arms | Rear Upper | Gladiator JT
——FOX 2.5 IFP Performance Series / Flex End (JSPEC171PS)
1FOX88624157FOX 2.5 IFP Shocks Package - Set of 4 | Performance Series | 2-3.5" Lift | Jeep Gladiator JT
1JKS1616Adjustable Control Arms | Front Upper | Wrangler JL and Gladiator JT
1JKS1625Adjustable Control Arms | Front Lower | Wrangler JL and Gladiator JT
1JKS1662Adjustable Control Arms | Rear Lower | Gladiator JT
1JKS1667Adjustable Control Arms | Rear Upper | Gladiator JT
——FOX 3.0 Factory Race Series / Rubber Bushing (JSPEC198FRS)
1FOX88326077FOX 3.0 Internal Bypass Reservoir Front Shocks Adjustable | Factory Race | 3.5-4.5 Inch Lift | Jeep Wrangler JL (18-27)
1FOX88326081FOX 3.0 Remote Reservoir Rear Shocks Adjustable | Factory Race Series Internal Bypass | 2-3 Lift | Gladiator JT
1JKS1632J-Link Adjustable Control Arms | Front Lower | Wrangler JL & Gladiator JT
1JKS1634J-Link Adjustable Control Arms | Front Upper | Wrangler JL & Gladiator JT
1JKS1637J-Link Adjustable Control Arms | Rear Upper | Gladiator JT
1JKS1638J-Link Adjustable Control Arms | Rear Lower | Gladiator JT
——FOX 2.0 Performance Series / Rubber Bushing (JSPEC198KFP)
2FOX98524179FOX 2.0 IFP Front Shock | 3.5-4 Inch Lift | Performance Series | Jeep Wrangler JL (18-27)
2FOX98524219FOX 2.0 IFP Rear Shock | 0-1.5 Inch Lift | Performance Series | Jeep Gladiator JT (20-26)
1JKS1632J-Link Adjustable Control Arms | Front Lower | Wrangler JL & Gladiator JT
1JKS1634J-Link Adjustable Control Arms | Front Upper | Wrangler JL & Gladiator JT
1JKS1637J-Link Adjustable Control Arms | Rear Upper | Gladiator JT
1JKS1638J-Link Adjustable Control Arms | Rear Lower | Gladiator JT
——FOX 2.5 Performance Elite / Rubber Bushing (JSPEC198PES)
1FOX88326051FOX 2.5 Front Shocks w/ DSC Reservoir Adjuster | 3.5-4 Inch Lift | Performance Elite Series | Jeep Wrangler JL (18-27)
1FOX88326074FOX 2.5 Rear Shocks w/ DSC Reservoir Adjuster | 2-3 Inch Lift | Performance Elite Series | Jeep Gladiator JT (20-23)
1JKS1632J-Link Adjustable Control Arms | Front Lower | Wrangler JL & Gladiator JT
1JKS1634J-Link Adjustable Control Arms | Front Upper | Wrangler JL & Gladiator JT
1JKS1637J-Link Adjustable Control Arms | Rear Upper | Gladiator JT
1JKS1638J-Link Adjustable Control Arms | Rear Lower | Gladiator JT
——FOX 2.5 IFP Performance Series / Rubber Bushing (JSPEC198PS)
1FOX88624157FOX 2.5 IFP Shocks Package - Set of 4 | Performance Series | 2-3.5" Lift | Jeep Gladiator JT
1JKS1632J-Link Adjustable Control Arms | Front Lower | Wrangler JL & Gladiator JT
1JKS1634J-Link Adjustable Control Arms | Front Upper | Wrangler JL & Gladiator JT
1JKS1637J-Link Adjustable Control Arms | Rear Upper | Gladiator JT
1JKS1638J-Link Adjustable Control Arms | Rear Lower | Gladiator JT

Features

  • Front/rear dual-rate coil springs are designed to great ride quality across any terrain while lifting/leveling stance.
  • Front/Rear Gas Shocks (FOX Adventure Series, FOX 2.0 Performance Series, FOX 2.5 Performance Series, FOX 2.5 Performance Elite or FOX 3.0 Factory Race Series) specifically valved for this suspension system for improved performance on and off-road.
  • Front adjustable track bar to correct axle positioning under the vehicle.
  • Front sway bar quicker disconnects and rear sway bar links for increased off-road articulation.
  • Front/rear bump stop extensions to properly limit suspension up travel.
  • Front/rear J-Flex or J-Link upper control arms to add strength and adjustability.
  • Front/rear J-Flex or J-Link lower control arms to add strength and adjustability.
  • Creates leveled stance

Recommended wheels & tires

  • Rubicon Models 37 x 12.5 with 17 x 9 and 5 in. Backspace
  • 37 x 12.5 with 20 x 9 and 5 in. Backspace
  • Non-Rubicon Models 35 x 12.5 with 17 x 9 and 5 in. Backspace
  • 35 x 12.5 with 20 x 9 and 5 in. Backspace
  • (Trimming may be required)

Installation

  • Estimated install time6 hrs
  • DifficultyDifficult

Free install support from the Trucks R Us tech team, for you or your shop.

Overview

Designed for maximum articulation, improved strength, and adjustability, these complete J-Krawl systems are available for next-level performance. Components include your choice of J-Flex or J-Link upper and lower control arms, Jspec dual-rate coil springs at each corner designed to level out the stance, and a variety of shock options tailored to your needs, including FOX Adventure Series, FOX 2.0 Performance Series, FOX 2.5 Performance Series, FOX 2.5 Elite Series and FOX 3.0 Factory Race Series shocks. Each setup ensures superior ride quality, letting you conquer rugged trails while maintaining daily driving comfort. Also included is an adjustable front track bar, quicker disconnect front sway bar end links, rear sway bar links, and bump stop extensions. J-Krawl builds off Jeep's factory suspension mounting points and upgrades everything front to rear. Adjustability is important for fine-tuning suspension geometry. J-Krawl delivers. Dial-in front caster, rear pinion, and overall vehicle wheelbase. The JKS Engineering team spent a lot of time dialing in the FOX shock valving and spring rates to suit J-Krawl's combination of parts as well as oversized wheels and tires. You'll be impressed with the stability and compression/rebound response. Take your Jeep's off-road performance and strength to the next level. It should be noted that an aftermarket front driveshaft is strongly recommended due to potential additional travel.

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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