Cusco Rear Member Bushing Collar

2015–2021 Subaru WRX STI 2.0L Turbo

Part #: 692 927 AB

Overview

The Cusco Rear Member Bushing Collar is an essential upgrade for Subaru WRX STI enthusiasts seeking enhanced handling and stability. Designed specifically for the 2015 through 2021 models, this aluminum collar reduces rubber bushing deflection in the rear sub-frame, providing a more direct connection between the chassis and suspension components. Whether you're a spirited driver, a track enthusiast, or someone looking to improve daily driving control, this collar helps deliver sharper steering response and improved traction.

By minimizing movement in the rear member bushings, you'll experience more predictable handling characteristics, especially during aggressive cornering or high-speed driving. The Cusco collar is engineered to support your vehicle's performance upgrades and to help maintain proper alignment under demanding conditions, ultimately contributing to a more confident driving experience.

Key Features

The Cusco Rear Member Bushing Collar offers several technical advantages designed to optimize your Subaru WRX STI's performance:

• Constructed from high-quality aluminum, ensuring durability and resistance to corrosion in various driving environments.
• Reduces rubber bushing deflection, which can cause alignment changes and compromise handling precision.
• Suppresses movement of the rear sub-member, resulting in improved control and traction during spirited driving or track use.
• Designed for easy installation without the need for complete disassembly of the rear suspension components.
• Precision-machined to fit perfectly around the existing bushings, ensuring a secure and stable connection.
• Supports consistent alignment settings, helping maintain optimal tire contact with the road surface.
• Lightweight yet robust, adding minimal weight to your vehicle while maximizing performance benefits.
• Compatible with factory and aftermarket suspension setups, making it a versatile upgrade for various builds.

Construction & Design

The Cusco Rear Member Bushing Collar is crafted from high-grade aluminum, chosen for its excellent strength-to-weight ratio and corrosion resistance. Its precision-machined design ensures a snug fit around the rear sub-member bushings, effectively pinching the rubber and reducing unwanted movement. The collar's lightweight construction does not compromise structural integrity, allowing for a seamless integration with your vehicle's existing suspension components.

The installation process involves pinching the collar in four places around the bushings—two on each side—without the need to completely separate the rear sub-frame. This design allows for a straightforward, bolt-on upgrade that can be completed with basic hand tools, making it accessible for DIY enthusiasts and professional mechanics alike.

The collar's design helps suppress alignment changes caused by bushing deflection, maintaining consistent handling characteristics and supporting your vehicle's performance upgrades. Its robust construction ensures long-lasting performance, even under demanding driving conditions.

Performance & Handling

By reducing bushing deflection, the Cusco Rear Member Bushing Collar enhances your Subaru WRX STI's overall handling response. Drivers will notice more precise steering feedback and improved stability during aggressive maneuvers. The collar helps support increased traction, especially during high-speed cornering, by minimizing unwanted movement in the rear suspension.

While it does not directly increase horsepower, this upgrade plays a crucial role in optimizing your vehicle's chassis stiffness and suspension geometry, contributing to a more connected and confident driving experience. The collar is ideal for those who want to maximize their car's handling capabilities without extensive suspension modifications.

Installation & Fitment

The Cusco Rear Member Bushing Collar is designed for a bolt-on installation that requires no cutting, drilling, or complex disassembly. The process involves loosening the existing bushings, positioning the collar around the bushings, and tightening it in four strategic places. This straightforward procedure can typically be completed in under an hour with basic hand tools.

No special tuning or alignment adjustments are necessary after installation, although it is recommended to have a professional alignment check to ensure optimal handling and tire wear.

• Easy bolt-on installation with no need for complete suspension removal
• Supports improved handling and stability for daily driving, spirited driving, or track use

What's Included

• Aluminum rear member bushing collar
• Installation hardware and instructions

Ideal For

• Subaru WRX STI owners looking to improve rear suspension stability
• Enthusiasts seeking sharper handling and more predictable cornering
• Track day participants aiming for enhanced control during aggressive driving
• Anyone wanting to reduce bushing deflection and maintain proper alignment under demanding conditions

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.