Cusco Rear Sway Bar

1998–2001 Subaru Impreza WRX / STI 2.0L

Part #: 660 311 BJ21

Overview

The Cusco 21mm Rear Sway Bar is an essential upgrade for Subaru Impreza WRX and STI enthusiasts seeking improved handling and cornering performance. Designed to replace the factory sway bar (if equipped), this high-quality component enhances your vehicle's stability during spirited driving and aggressive cornering. Whether you're a daily driver looking for better body control or a performance enthusiast pushing your Impreza to its limits, this sway bar delivers noticeable improvements in reducing body roll and increasing chassis responsiveness.

Constructed with durability and performance in mind, the Cusco rear sway bar helps you achieve a more planted and balanced ride. Its increased stiffness compared to the factory component ensures your vehicle maintains better grip and stability, especially during high-speed turns. The installation is straightforward, utilizing the existing factory mounting points, making it an ideal upgrade for those looking to enhance their Subaru's handling without extensive modifications.

Key Features

The Cusco Rear Sway Bar is engineered with precision to deliver superior performance and durability. Key features include:

• 21mm diameter steel sway bar, offering increased torsional resistance over the stock component for improved body roll control.
• Manufactured by Cusco, a renowned brand known for high-performance suspension components and racing-grade engineering.
• Designed to replace the factory sway bar using the original mounting locations, ensuring a perfect fit and easy installation.
• Constructed from high-strength steel to withstand aggressive driving and maintain long-term performance.
• Reduces body roll during cornering, providing a more stable and confident driving experience.
• Helps support better weight transfer management, enhancing overall vehicle handling and responsiveness.
• Compatible with Subaru Impreza WRX and STI models from 1998 to 2001, covering key years of the early 2000s performance models.

Construction & Design

The Cusco 21mm Rear Sway Bar features a robust steel construction, meticulously engineered to provide optimal torsional stiffness. Its one-piece design ensures consistent performance and durability under demanding driving conditions. The bar's diameter of 21mm strikes a balance between comfort and performance, offering significant reduction in body roll without compromising ride quality. The use of high-quality steel and precision manufacturing techniques guarantees a long-lasting component that maintains its shape and effectiveness over time. The sway bar's design integrates seamlessly with the factory mounting points, ensuring a secure fit and straightforward installation.

Performance & Handling

By upgrading to the Cusco 21mm Rear Sway Bar, you will experience a more responsive and balanced vehicle. The increased stiffness helps minimize body roll during aggressive cornering, allowing for sharper turn-in and improved overall handling. This upgrade supports better weight transfer management, translating to enhanced grip and stability. While it primarily focuses on reducing body roll, the sway bar also contributes to a more direct and connected steering feel, giving you greater confidence behind the wheel. This component is ideal for drivers who want to elevate their Subaru Impreza's handling capabilities without sacrificing comfort.

Installation & Fitment

The Cusco Rear Sway Bar is designed for a bolt-on installation using the vehicle's existing mounting points. No cutting, drilling, or complex modifications are required, making it accessible for DIY enthusiasts and professional installers alike. The process typically involves removing the factory sway bar and replacing it with the Cusco unit, ensuring a secure and precise fit. Basic hand tools are sufficient, and detailed instructions are usually included to facilitate a smooth installation process. Once installed, you'll immediately notice the improved stability and handling characteristics.

What's Included

• Complete Cusco 21mm Rear Sway Bar
• Mounting brackets and hardware
• Installation instructions

Ideal For

• Subaru Impreza WRX and STI owners seeking improved cornering and stability
• Performance enthusiasts looking to reduce body roll during spirited driving
• Daily drivers wanting a more planted and confident ride
• Track day participants aiming for better handling characteristics