Cusco Adjustable Rear Upper Arms

2011–2025 Toyota Mark X (GRX120/GRX130) / Crown (GRS210/GRS214) / Lexus IS250/IS350 Rear Upper Arm (Front) 199 474 G

Part #: 199 474 G

Overview

The Cusco Adjustable Rear Upper Arms are engineered to enhance your vehicle's handling and suspension performance. Designed specifically for select Toyota, Lexus, and Crown models, these high-quality suspension components allow for precise alignment adjustments, giving you greater control and stability on the road or track. Whether you're a spirited driver, a motorsports enthusiast, or someone seeking improved ride quality, these upper arms are an excellent upgrade to help you unlock your vehicle's full potential.

Constructed with durability and performance in mind, the Cusco adjustable arms help reduce factory bushing slop, resulting in more direct and predictable handling. They are ideal for vehicles that have been modified for higher grip tires or aggressive driving, as they support better suspension geometry and cornering capabilities. By integrating these adjustable arms into your suspension setup, you'll experience more responsive steering, improved tire contact, and enhanced overall driving confidence.

Key Features

Designed to provide maximum performance and adjustability, the Cusco Rear Upper Arms feature advanced engineering and high-quality materials. Here are some of the key features that make these components a must-have for serious enthusiasts:

• Constructed from lightweight yet strong materials, ensuring durability and resistance to corrosion for long-lasting performance.
• Fully adjustable design allows for precise camber and caster alignment, enabling fine-tuning to suit your driving style and track conditions.
• Designed to limit factory bushing slop, providing a more direct connection between the suspension and chassis for improved handling response.
• Engineered to work seamlessly with existing suspension components, maintaining proper suspension geometry and ride quality.
• Compatible with factory mounting points, making installation straightforward without the need for extensive modifications.
• Ideal for motorsports, spirited driving, or anyone looking to improve vehicle stability and cornering performance.
• Manufactured by Cusco, a trusted name in high-performance suspension parts with a reputation for quality and precision engineering.

Construction & Design

The Cusco Rear Upper Arms are crafted from high-strength materials, featuring a robust design that withstands the rigors of aggressive driving and racing environments. The arms incorporate precision TIG welding and CAD-developed components to ensure a perfect fit and optimal performance. The adjustable rod ends are designed for smooth, reliable operation, allowing for easy adjustments without sacrificing strength or durability. The black anodized finish not only adds a sleek appearance but also provides corrosion resistance, ensuring these components remain in excellent condition over time.

Performance & Sound

By replacing the factory upper arms with Cusco's adjustable units, you will notice a more responsive and predictable handling experience. The improved suspension geometry helps support better tire contact during cornering, translating to increased grip and stability. While these arms do not significantly alter vehicle sound, their high-quality construction ensures quiet operation and reliable performance under demanding conditions. They are an excellent upgrade for those seeking to optimize their vehicle's handling characteristics without compromising ride comfort.

Installation & Fitment

The Cusco Adjustable Rear Upper Arms are designed as direct bolt-on replacements for the factory components on compatible Toyota, Lexus, and Crown models. Installation typically requires basic hand tools and alignment adjustments. No cutting, drilling, or complex modifications are necessary, making this a straightforward upgrade for experienced DIY enthusiasts or professional technicians. Proper alignment after installation is recommended to maximize handling benefits and tire wear.

• Easy bolt-on installation using factory mounting points
• No cutting or drilling required
• Alignment adjustments recommended for optimal performance

What's Included

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

Ideal For

• Performance enthusiasts seeking improved handling and suspension tuning
• Owners of Toyota Mark X, Crown, or Lexus IS models looking to enhance cornering and stability
• Motorsports participants requiring precise suspension adjustments
• Drivers upgrading their suspension for track days or spirited driving

Emissions Note

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