SPC Adjustable Rear Upper Arm for 2007-2025 Jeep Wrangler [13421]

Description
SPC Adjustable Rear Upper Arm for 2007-2025 Jeep Wrangler [13421]

SPC 13421 – JEEP REAR ADJUSTABLE UPPER ARM

Part Number: 13421

Summary: The SPC 13421 Rear Adjustable Upper Arm is designed to enhance articulation and strength for Jeep Wranglers. Featuring the innovative xAxis™ sealed flex joint, this arm ensures bind-free twist during off-road conditions while significantly reducing NVH with its OE style rubber bushing. The factory components often lack the necessary adjustability and strength for large tires and aggressive gearing, making this adjustable arm an essential upgrade for both stock-height and lifted applications.

Features

• xAxis™ Joint: Sealed flex joint provides bind-free twist to ensure maximum articulation during off-road use.
• Dual-Threaded Adjuster: Allows for quick and easy adjustments provides convenient caster/pinion angle changes to ensure optimal alignment without disconnecting the arm.
• Forged Link: High-strength construction provides durability under heavy loads to ensure performance with large tires and aggressive gearing.

Technical Specifications

Fitment

• 2007 – 2025 Jeep Wrangler
• 2018 Jeep Wrangler JK
• Note: Fitment notes exactly as provided.

What’s Included

• Sold Individually
• Includes adjustable upper arm with xAxis™ joint and necessary hardware.

Why Choose This Product?

• Alignment Solution: This upper arm allows for precise caster and pinion angle adjustments, significantly improving tire wear and handling on lifted or stock-height Wranglers.
• Engineering Advantage: The xAxis™ joint and dual-threaded adjuster provide a unique combination of flexibility and adjustability, ensuring optimal performance in both on and off-road conditions.

Frequently Asked Questions

Why do I need adjustable control arms?
Adjustable control arms are essential for lifted Wranglers as they run out of factory adjustment range for caster and pinion angles, leading to poor alignment and tire wear.

Is this part maintenance free?
Yes, the xAxis™ joint is sealed and designed to be maintenance-free, providing a reliable performance without the need for regular servicing.

What materials are used in the construction?
The arm is constructed from D.O.M. steel, ensuring high strength and durability under demanding conditions.

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