Cusco Rear Sway Bar

1998–2001 Subaru Impreza WRX / STI 2.0L

Part #: 660 311 BJ21

Overview

The Cusco 21mm Rear Sway Bar is a high-performance suspension upgrade designed specifically for Subaru Impreza WRX and STI models from 1998 to 2001. This sway bar replaces the factory component, providing a significant improvement in handling dynamics and vehicle stability during spirited driving or aggressive cornering. Whether you're a performance enthusiast, a rally competitor, or a daily driver seeking enhanced control, this sway bar helps you achieve a more responsive and balanced ride.

Constructed with precision and durability in mind, the Cusco rear sway bar reduces body roll and minimizes weight transfer, resulting in improved cornering grip and overall vehicle stability. Its increased torsional resistance compared to the stock sway bar ensures your Impreza remains planted through turns, giving you greater confidence behind the wheel. The installation is straightforward, utilizing the factory mounting points, making it an ideal upgrade for those looking to enhance their vehicle's handling without extensive modifications.

Key Features

The Cusco 21mm Rear Sway Bar offers a range of technical advantages designed to elevate your Subaru Impreza's performance:

• Constructed from high-strength steel to provide increased torsional stiffness and durability.
• 21mm diameter offers a substantial upgrade over the factory sway bar, reducing body roll and improving cornering response.
• Uses the factory mounting locations, ensuring a bolt-on installation without the need for drilling or modifications.
• Designed to work seamlessly with the factory suspension components, maintaining ride comfort while enhancing handling.
• Reduces weight transfer during aggressive driving, helping to keep the vehicle more level and stable in turns.
• Ideal for street, spirited driving, and track use, providing a balanced blend of performance and everyday drivability.
• Part of Cusco's renowned lineup of suspension components, trusted by motorsport enthusiasts worldwide.

Construction & Design

The Cusco rear sway bar is crafted from high-quality steel, ensuring long-lasting performance and resistance to deformation under stress. Its 21mm diameter tube is engineered for optimal torsional stiffness, effectively reducing body roll without compromising ride comfort. The sway bar features a powder-coated finish that resists corrosion and environmental wear, maintaining its appearance and integrity over time. Its design incorporates precise bends and mounting points, ensuring a perfect fit and straightforward installation using the factory hardware.

Performance & Sound

By upgrading to the Cusco 21mm Rear Sway Bar, you'll notice a more responsive and confident handling experience. The increased stiffness helps the vehicle maintain a flatter stance during cornering, reducing understeer and oversteer tendencies. While this upgrade primarily enhances handling, it also contributes to a more connected and engaging driving feel. The sway bar operates silently, with no additional noise or vibration, allowing you to enjoy improved performance without unwanted distractions.

Installation & Fitment

The installation process is straightforward, utilizing the factory mounting points and hardware. No cutting, drilling, or complex modifications are required, making it a suitable upgrade for DIY enthusiasts and professional installers alike. The sway bar bolts directly onto the existing suspension mounting locations, ensuring a secure and precise fit. It is recommended to inspect and replace any worn bushings or end links during installation to maximize performance and longevity.

• Easy bolt-on installation using factory mounting points
• No cutting, drilling, or tuning required
• Compatible with factory suspension components

What's Included

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

Ideal For

• Subaru Impreza WRX and STI owners seeking improved handling and stability
• Enthusiasts looking for a balanced upgrade for street and track use
• Drivers wanting to reduce body roll and enhance cornering confidence

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.