Bolt-On 4-Link Long Arm Upgrade System, Jeep JL Wrangler, 4-Door

The MetalCloak “Bolt-On” Long Arm Upgrade System converts your Jeep’s factory short arm suspension into a full long arm setup. The upgrade delivers superior control, consistent wheelbase throughout the suspension cycle, and improved pinion angle for better drivability both on and off-road.

The kit comes complete with all components required for the conversion.

Key features and components

• 2 front upper Duroflex control arms (1.25" DOM, 3/16" wall)
• 2 front lower Duroflex control arms (2.0" DOM, 1/4" wall)
• 2 rear upper Duroflex control arms (1.5" DOM, 3/16" wall)
• 2 rear lower Duroflex control arms (2.0" DOM, 1/4" wall)
• Heavy-duty 1/4" steel frame brackets to replace factory mounts
• Rear control arm mounts shaped for better clearance and sliding over obstacles
• Reinforced 3/16" steel crossmember to replace the factory unit
• Durable gold zinc finish for corrosion resistance
• All necessary hardware included
• 100% Made in the USA

Technology and advantages

• Duroflex™ Joints – patented bushings with up to 34° of movement, Kevlar® reinforced, low-maintenance, self-centering design.
• Forged threaded ends – stronger and more fatigue-resistant than cast components.
• High-clearance arm design – reduces interference at full suspension travel.
• Optimized geometry – maintains correct wheelbase and suspension angles in extreme off-road conditions.

Technical specifications

Installation notes

• Requires removal of factory rear control arm brackets.
• Wheel alignment recommended after installation.
• Average installation time: 12–14 hours.
• Sold only as a complete kit (no partial returns).
• Minor trimming of the crossmember may be necessary on some JL/JT models.

Application

Ideal for Jeep JL Wrangler 4-door owners who demand:

• enhanced vehicle control on and off-road,
• consistent geometry through full suspension travel,
• maximum strength and durability,
• superior performance in off-road and rock crawling conditions.