Cusco Adjustable Rear Upper Arms

2016–2025 Mazda MX-5 (ND) 2.0L / 2.0L Turbo

Part #: 429 474 LB

Overview

The Cusco Adjustable Rear Upper Arms are high-performance suspension components designed specifically for the Mazda MX-5 (ND) model years 2016 through 2025. Crafted to enhance your vehicle's handling and responsiveness, these upper control arms allow for precise suspension tuning to suit a variety of driving conditions, from spirited street driving to competitive motorsports. Whether you're looking to improve cornering stability, reduce wheel hop, or fine-tune your alignment settings, these adjustable arms provide the versatility and durability needed for demanding driving scenarios.

Built with performance enthusiasts in mind, the Cusco rear upper arms help you achieve optimal suspension geometry, ensuring your MX-5 maintains excellent tire contact and predictable handling characteristics. They are an excellent upgrade for those who have already invested in high-grip tires or other suspension modifications, as they help eliminate factory bushing slop and provide more direct feedback from the road. With these components, you'll get improved steering response, better control during aggressive maneuvers, and a more connected driving experience.

Key Features

The Cusco Adjustable Rear Upper Arms are engineered with precision and quality to deliver superior performance and durability. Key features include:

• Constructed from high-strength steel with a durable black finish for corrosion resistance and long-lasting performance.
• Fully adjustable design allows for precise camber and toe adjustments, enabling optimal suspension geometry tailored to your driving style and track conditions.
• Designed to reduce factory bushing slop, resulting in more direct steering feel and improved handling response.
• Engineered to work seamlessly with other Cusco suspension components, providing a cohesive upgrade path for serious enthusiasts.
• Manufactured with TIG-welded joints for enhanced strength and reliability under demanding conditions.
• Easy bolt-on installation with no need for extensive modifications or specialized tools.
• Ideal for motorsports, spirited driving, or anyone seeking to maximize their MX-5's handling capabilities.

Construction & Design

The Cusco rear upper arms are crafted from high-quality steel, ensuring strength and durability while maintaining a lightweight profile. The arms feature a precision-machined adjustable rod end, allowing for fine-tuning of camber and toe angles. The design incorporates a robust TIG-welded construction, which enhances structural integrity and ensures consistent performance over time. The black protective coating not only adds an aggressive aesthetic but also guards against corrosion and environmental wear, making these arms suitable for both street and track use.

The adjustable nature of these arms means you can dial in your suspension settings with confidence, optimizing handling for different driving conditions or track configurations. The design also helps to eliminate factory bushing slop, which can cause vague steering and inconsistent handling, especially during aggressive driving or high-speed cornering.

Performance & Handling

By replacing the factory upper control arms with Cusco's adjustable units, you gain a more precise suspension setup that enhances overall vehicle control. The improved geometry helps support better tire contact patch during cornering, leading to increased grip and stability. The ability to adjust camber and toe allows you to tailor the handling characteristics to your specific needs, whether for daily driving, autocross, or track days.

These arms contribute to a more responsive steering feel and help reduce understeer or oversteer tendencies, giving you greater confidence behind the wheel. The high-quality construction ensures consistent performance, even under the stresses of spirited driving or competitive motorsports.

Installation & Fitment

The Cusco Adjustable Rear Upper Arms are designed as direct bolt-on replacements for the factory components on the Mazda MX-5 (ND). Installation typically requires basic hand tools and a lift or jack stands. No cutting, drilling, or complex modifications are necessary, making it a straightforward upgrade for those familiar with suspension work. Proper alignment is recommended after installation to ensure optimal handling and tire wear.

For best results, it is advisable to have a professional alignment performed after installing these adjustable arms to set the camber and toe angles precisely to your driving preferences.

What's Included

• Pair of Cusco Adjustable Rear Upper Arms
• All necessary mounting hardware and nuts
• Installation instructions

Ideal For

• Enthusiasts seeking to improve handling and suspension response
• Track day and autocross participants
• Owners upgrading their MX-5 for better cornering stability
• Performance-oriented street drivers

Emissions Note

This product is designed for off-road or racing use only and may not be legal for use on public roads in all jurisdictions. Please check local regulations before installation.