Prothane 04 Subaru WRX/STI Rear Sway Bar Bushings 19mm Red

Description

Product Overview

The Prothane 04 rear sway bar bushings are a purpose‑built solution for Subaru WRX and STI owners who demand both performance and reliability from their suspension components. Each bushing is fabricated from high‑grade polyurethane that has been engineered to resist compression set, wear, and environmental degradation, ensuring a long service life even under the most demanding driving conditions. The 19mm diameter fits the factory‑specified bushing housing perfectly, eliminating any play or misalignment that could compromise handling. Finished in a vivid red color, these bushings not only perform exceptionally but also add a subtle visual cue that highlights the upgraded nature of the vehicle’s suspension system. Precision machining guarantees a seamless fit, while the material composition provides a balance of rigidity for responsive handling and elasticity to dampen road noise and vibration. The design incorporates a generous grease reservoir that retains lubrication, further reducing friction and extending the interval between maintenance checks. With a weight of just under three ounces, the bushings add negligible mass, preserving the vehicle’s dynamic balance. They are compatible with the OEM part number 16‑1103, making them a direct replacement that requires no additional modifications or adapters. Installation is straightforward, typically completed with basic hand tools, and the product comes with clear instructions to guide even novice mechanics through the process. By choosing Prothane 04, drivers benefit from a component that meets rigorous automotive standards while delivering the performance edge needed for spirited driving on both street and track.

Usage

These rear sway bar bushings are designed for a wide range of driving scenarios, from everyday commuting to high‑performance track sessions. In daily city traffic, the polyurethane material absorbs minor road imperfections, delivering a quieter cabin experience and reducing driver fatigue on long trips. For weekend enthusiasts who take their WRX/STI to the track, the bushings’ inherent rigidity ensures that the rear sway bar maintains its intended geometry, providing consistent roll resistance and sharper cornering response. The 19mm size aligns perfectly with the factory mounting points, allowing the sway bar to function as intended without the need for additional reinforcement or custom brackets. Off‑road adventures, such as gravel roads or light rally conditions, also benefit from the bushings’ durability; the material resists tearing and cracking even when exposed to dust, moisture, and temperature fluctuations. Because the bushings retain grease within their structure, they continue to perform reliably in harsh environments, minimizing the risk of squeaks or premature wear. Installation can be performed at home or in a professional shop, and the process typically involves removing the old rubber bushings, cleaning the housing, and pressing the new polyurethane units into place. Whether the vehicle is used for spirited driving, daily commuting, or occasional track days, the Prothane 04 bushings provide a versatile upgrade that enhances handling precision while maintaining comfort.

Why Choose Us

Prothane has built its reputation on precision fabrication and a commitment to delivering components that exceed OEM specifications. Each bushing undergoes a rigorous quality‑control process that includes dimensional inspection, material testing, and performance validation to ensure that every unit meets the exacting standards required by performance‑oriented Subaru owners. The use of premium polyurethane not only offers superior durability compared to traditional rubber but also provides a self‑lubricating surface that reduces friction and extends service intervals. Our manufacturing process incorporates advanced molding techniques that eliminate inconsistencies, resulting in a product that fits flawlessly and performs reliably from the first mile. In addition to the technical advantages, Prothane offers comprehensive customer support, including detailed installation guides, responsive technical assistance, and a warranty that reflects confidence in product longevity. When you purchase Prothane 04 bushings, you are investing in a component that has been tested under real‑world conditions and praised by a community of enthusiasts who value both performance and reliability. The combination of material excellence, precise engineering, and dedicated after‑sales service makes Prothane the trusted choice for drivers seeking to upgrade their suspension without compromising on quality.

Key Features

• Precision‑machined 19mm fit ensures perfect alignment with factory mounting points
• Premium polyurethane construction delivers quiet operation and long‑term durability
• Integrated grease reservoir maintains lubrication, reducing maintenance frequency
• Red finish adds a subtle visual upgrade while resisting UV fading and corrosion
• Backed by Prothane customer support and warranty for peace of mind

FAQ

Will these bushings fit my Subaru WRX or STI without modifications?

Yes, the Prothane 04 bushings are sized to match the OEM part number 16‑1103 and require no additional brackets or adapters for a direct replacement.

How does polyurethane compare to the original rubber bushings?

Polyurethane offers greater resistance to wear, compression set, and temperature extremes, while also providing a quieter ride due to its self‑lubricating properties.

Can I install these bushings myself, or do I need a professional?

The installation process is straightforward and can be completed with basic hand tools. Detailed instructions are included, and many owners successfully install them at home.

What is the expected lifespan of the Prothane 04 bushings?

When maintained properly, the polyurethane bushings can last significantly longer than standard rubber units, often exceeding 50,000 miles under normal driving conditions.

Do the bushings affect vehicle handling on the track?

Yes, the increased rigidity of the polyurethane material helps maintain sway bar geometry, delivering more consistent roll resistance and sharper cornering response during high‑performance driving.