Cusco Pillowball Rear Trailing Arm Bushing Kit

1992–1999 Subaru GC8 WRX / 2001–2007 GDB Subaru STI 2.0L–2.5L

Part #: 660 464 EV

Overview

The Cusco Pillowball Rear Trailing Arm Bushing Kit is a high-performance upgrade designed for Subaru enthusiasts who seek enhanced handling, precise steering response, and improved cornering capabilities. Specifically engineered for the Subaru GC8 WRX and GDB STI models from 1992 to 1999 and 2001 to 2007 respectively, this kit replaces factory rubber bushings with high-precision pillow balls that deliver a more direct and responsive connection between your suspension components.

Whether you're a spirited street driver, a track enthusiast, or an off-road adventurer, this bushing kit helps you unlock your vehicle's true potential by reducing alignment changes and minimizing suspension deflection during aggressive driving. The result is a more predictable and stable driving experience, especially in high-load cornering and straight-line stability.

Key Features

The Cusco Pillowball Rear Trailing Arm Bushing Kit offers several advanced features designed to maximize performance and durability:

• High-precision pillow balls crafted from durable materials, often used in racing vehicles, ensure minimal play and maximum control.
• Reduces alignment shift caused by suspension movement, maintaining optimal tire contact with the road surface.
• Strengthens suspension joints that are constantly loaded during driving, improving overall chassis stiffness and response.
• Uses rubber boots to protect the pillow balls from dirt, debris, and moisture, extending service life and maintaining smooth operation.
• Designed with a focus on precise fitment and ease of installation, ensuring a secure and reliable upgrade.
• Constructed to fully demonstrate the original performance of your suspension without compression or deflection, providing a more direct feel.
• Ideal for drivers seeking improved steering feedback, cornering accuracy, and straight-line stability in demanding driving conditions.

Construction & Design

The Cusco Pillowball Rear Trailing Arm Bushing Kit features high-quality pillow balls made from hardened steel or similar materials, ensuring resistance to wear and deformation under high loads. The bushings are housed within a robust metal casing that maintains precise alignment and prevents unwanted movement. The inclusion of rubber boots shields the pillow balls from dirt and contaminants, preserving their performance over time.

The design emphasizes durability and performance, with components engineered through CAD development and TIG welding for superior strength and fitment. The one-piece housing and mandrel-bent components contribute to a seamless installation process and long-lasting reliability. This thoughtful construction ensures your suspension maintains its integrity and responsiveness, even after extended use in spirited driving or racing scenarios.

Installation & Fitment

The Cusco Pillowball Rear Trailing Arm Bushing Kit is designed as a bolt-on upgrade, requiring no cutting, drilling, or extensive modifications. The installation process involves removing the factory bushings and pressing in the pillowball units using standard tools. It is recommended to have a professional mechanic perform the installation to ensure proper alignment and torque specifications are met. Once installed, you'll experience a more responsive and stable suspension system that enhances your driving confidence.

• Easy bolt-on installation with common hand tools
• No cutting, drilling, or tuning required
• Designed for a direct replacement of factory bushings

What's Included

• Complete pillowball rear trailing arm bushing kit with high-precision pillow balls
• Rubber boots for dirt and debris protection
• Necessary hardware and installation instructions

Ideal For

• Subaru GC8 WRX and GDB STI owners seeking improved handling and steering response
• Performance enthusiasts looking to reduce suspension flex and maintain alignment stability
• Track day drivers and spirited street users who demand precise cornering and straight-line stability