Prothane Rear Sway Bar Bushing Kit

2004–2005 Subaru Impreza WRX STI 19mm or 20mm Rear Sway Bar

Part #: 16-1103

Overview

The Prothane Rear Sway Bar Bushing Kit is designed to enhance the handling and stability of your 2004-2005 Subaru Impreza WRX STI. This high-quality bushing kit replaces the factory rubber bushings with durable polyurethane components, providing improved responsiveness and reduced body roll during spirited driving or aggressive cornering. Whether you're a performance enthusiast or a daily driver looking for better control, this kit helps support a more precise and confident driving experience.

Engineered specifically for Subaru WRX STI models equipped with 19mm or 20mm rear sway bars, this kit ensures a perfect fit and reliable performance. By upgrading your sway bar bushings, you'll notice improved steering feel, reduced squeaking, and enhanced overall chassis stiffness, making your vehicle more agile and responsive on twisty roads or track days.

Key Features

The Prothane Rear Sway Bar Bushing Kit offers several technical advantages designed to maximize your vehicle's handling capabilities:

• Constructed from high-quality polyurethane material that resists wear, cracking, and deterioration over time, ensuring long-lasting performance.
• Precisely molded to match OEM specifications for a seamless fit and easy installation without modifications.
• Polyurethane bushings provide a firmer, more responsive connection between the sway bar and chassis compared to factory rubber bushings, translating to sharper turn-in and reduced body roll.
• Designed to withstand harsh conditions, including exposure to road salts, oils, and temperature fluctuations, maintaining performance over the lifespan of your vehicle.
• Reduces unwanted movement and squeaking common with worn rubber bushings, resulting in a quieter, more controlled ride.
• Easy to install with basic hand tools, making it a straightforward upgrade for DIY enthusiasts and professional installers alike.
• Compatible with both 19mm and 20mm rear sway bars, ensuring versatility across different Subaru WRX STI models within the specified years.
• Enhances overall chassis stiffness, contributing to improved handling dynamics and driver confidence during aggressive driving.
• Ideal for street performance, spirited driving, and track use, where precise suspension response is critical.

Construction & Design

The Prothane Rear Sway Bar Bushing Kit features a robust polyurethane formulation that balances flexibility with durability. The bushings are precisely molded to match OEM dimensions, ensuring a snug fit that minimizes movement and maximizes performance. The kit includes all necessary components—bushings and metal sleeves—to facilitate a complete and secure installation. The polyurethane material not only resists degradation but also maintains its shape and firmness over time, unlike rubber bushings that tend to soften and crack.

The design emphasizes ease of installation, with bushings that slide onto the sway bar and fit securely into the mounting brackets. The kit's construction ensures consistent performance and a noticeable improvement in handling response, making it a popular upgrade among Subaru enthusiasts seeking to optimize their vehicle's suspension system.

Installation & Fitment

The Prothane Rear Sway Bar Bushing Kit is designed for a straightforward, bolt-on installation. No cutting, drilling, or complex modifications are required. The kit includes all necessary hardware and instructions to replace your existing bushings quickly and easily. Proper lubrication of the polyurethane bushings during installation is recommended to ensure smooth operation and longevity. The bushings are compatible with 2004-2005 Subaru Impreza WRX STI models equipped with 19mm or 20mm rear sway bars, providing a perfect fit for these vehicles.

• Simple bolt-on upgrade with basic hand tools
• No modifications or tuning required
• Replaces worn factory rubber bushings for improved handling

What's Included

• Polyurethane sway bar bushings (for 19mm or 20mm bars)
• Metal sleeves for secure mounting
• Installation instructions

Ideal For

• Subaru Impreza WRX STI owners seeking improved handling and responsiveness
• Enthusiasts looking to reduce body roll and enhance steering feel
• Drivers wanting a durable, long-lasting suspension upgrade
• Performance-oriented street and track drivers