JKS Manufacturing Adjustable J-Flex Rear Lower Control Arms

Jeep Wrangler 07-18 3.8L/3.6L/2.0L

JKS1660

Overview:

The JKS Manufacturing Adjustable J-Flex Rear Lower Control Arms are engineered to enhance the suspension performance and reliability of your Jeep Wrangler and Grand Cherokee. Designed for off-road enthusiasts and daily drivers alike, these control arms provide precise adjustability to optimize suspension geometry, improving handling, articulation, and tire clearance. Whether you are upgrading your Jeep for rugged trails or seeking a durable replacement for factory components, the J-Flex arms deliver strength and versatility in one package.

Built to withstand demanding conditions, these control arms allow you to fine-tune your rear suspension setup for improved drivability and stability. Their fully rebuildable and greaseable ends ensure long-term serviceability, making them a smart investment for Jeep owners who demand both performance and durability.

Key Features:

JKS Manufacturing’s Adjustable J-Flex Rear Lower Control Arms combine advanced engineering with robust materials to offer the following benefits:

• Fully adjustable arm length for precise suspension geometry tuning
• Forged adjustable flex ends with jam nuts featuring heavy-duty 1-1/4"-12 threads for secure, easy adjustments
• Factory-style rubber bushings at the non-adjustable ends for quiet, maintenance-free operation
• CNC-formed DOM tubing construction for optimal tire, frame, and axle clearance
• Powder-coated finish for long-lasting corrosion resistance and durability
• Rebuildable and greaseable forged ends to extend service life and maintain performance
• Designed to fit a wide range of Jeep Wrangler JK models and select Jeep Grand Cherokee years
• Sold in pairs for complete rear suspension upgrades

Construction & Design:

Each control arm is precision CNC-bent from heavy-duty DOM (Drawn Over Mandrel) steel tubing, ensuring superior strength and consistent quality. The adjustable design incorporates forged flex ends that are fully rebuildable and greaseable, allowing for easy maintenance and extended durability. The hex-shaped weld-in bungs and robust jam nuts provide a secure, vibration-resistant adjustment mechanism that holds settings firmly in place during off-road use.

The non-adjustable ends feature factory-style rubber bushings that reduce noise and vibration, delivering a smooth and quiet ride without sacrificing durability. The entire assembly is finished with a tough powder coat that protects against rust and wear, ensuring your control arms maintain their appearance and performance over time.

Installation & Fitment:

Installation of the JKS Adjustable J-Flex Rear Lower Control Arms is straightforward and designed to bolt directly onto your Jeep’s existing suspension mounts without the need for modifications. The adjustable length allows for fine-tuning after installation to achieve optimal alignment and suspension geometry. These arms fit most Jeep Wrangler models from 2007 through 2018, including Rubicon, Sahara, Sport, Sport S, Unlimited variants, and select Jeep Grand Cherokee models from 2005 to 2010.

Professional installation is recommended to ensure proper adjustment and alignment, especially when used in lifted or heavily modified suspension setups.

What's Included:

• Pair of adjustable J-Flex rear lower control arms
• Jam nuts for secure adjustment
• Grease fittings installed on forged ends
• Installation hardware (where applicable)
• Detailed installation instructions

Ideal For:

These adjustable rear lower control arms are ideal for Jeep owners who want to improve their vehicle’s rear suspension performance, whether for off-road adventures, trail riding, or enhanced on-road handling. They are especially suited for those running lifted suspensions or who require precise control over suspension geometry to prevent premature wear and improve tire clearance. The rebuildable design also appeals to enthusiasts who prioritize long-term maintenance and durability.

JKS Manufacturing builds Jeep and off-road suspension parts—lift systems, control arms, track bars, disconnects, and supporting hardware—engineered for articulation and durability. It’s a popular choice for Wrangler and Gladiator owners looking to improve clearance, ride quality, and capability for real trail use.