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). Engineered to enhance your vehicle's handling and cornering capabilities, these adjustable arms provide precise suspension tuning to meet the demands of spirited driving, track days, or competitive motorsports. Whether you're a dedicated enthusiast or a professional racer, these arms help you achieve optimal alignment settings, improve stability, and reduce unwanted suspension slop.

Constructed with durability and precision in mind, the Cusco rear upper arms are an excellent upgrade over the factory components, especially when combined with other high-performance modifications. They are ideal for drivers seeking improved responsiveness, better control during aggressive maneuvers, and a more connected driving experience.

Key Features

The Cusco Adjustable Rear Upper Arms incorporate several advanced features to maximize performance and reliability:

• Manufactured from high-strength steel with a durable coating to resist corrosion and withstand harsh driving conditions.
• Adjustable design allows for fine-tuning of camber and rear suspension geometry, enabling optimal tire contact patch and handling characteristics.
• Precision-machined mounting points ensure a perfect fit and consistent alignment adjustments.
• Designed to limit factory bushing slop, providing more direct and responsive steering feedback.
• Compatible with factory mounting points, making installation straightforward without the need for extensive modifications.
• Part of Cusco's reputation for high-quality, motorsport-grade suspension components that support aggressive driving and track use.
• Helps improve vehicle stability during high-speed cornering and reduces body roll, enhancing overall driving confidence.
• Designed to work seamlessly with other Cusco suspension parts and aftermarket upgrades for a comprehensive handling upgrade.

Construction & Design

The Cusco rear upper arms are crafted from high-quality steel, ensuring strength and longevity under demanding conditions. The arms feature a precision-adjustable design, allowing you to dial in camber settings to suit your driving style or track requirements. The components are TIG-welded for superior strength and durability, and the coating provides excellent corrosion resistance, making them suitable for both street and track use. The design emphasizes a direct, responsive feel, helping you maintain control during spirited driving sessions.

Performance & Sound

By replacing the factory upper arms with Cusco's adjustable units, you'll notice a more precise and responsive suspension feel. The ability to fine-tune camber improves tire grip and handling, especially during aggressive cornering. While these arms do not produce additional sound, their stiffened and more direct connection to the chassis contribute to a more engaged driving experience. They support increased confidence and stability, particularly when combined with other suspension upgrades.

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. The adjustable design allows for easy alignment adjustments after installation, making it a convenient upgrade for enthusiasts who want to optimize their vehicle's handling without extensive downtime.

• Simple bolt-on installation with factory mounting points
• No special tuning or alignment required beyond standard procedures

What's Included

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

Ideal For

• Enthusiasts seeking to improve handling and suspension responsiveness
• Track day drivers and motorsport participants
• Owners upgrading their Mazda MX-5 (ND) for better cornering and stability
• Drivers looking to fine-tune rear camber for optimal tire contact

Emissions Note

These suspension components are designed for off-road or racing use only and are not emissions-compliant for street use in certain regions. Please verify local regulations before installation.