Cusco Final Gear

2013–2020 Subaru BRZ / Scion FR-S / Toyota 86 6-Speed Manual Transmission

Part #: 965 029 A45

Overview

The Cusco 4.556 Final Gear is a high-performance transmission upgrade designed specifically for the Subaru BRZ, Scion FR-S, and Toyota 86 equipped with a 6-speed manual transmission. Engineered for driving enthusiasts who seek to maximize their vehicle's track capabilities, this final gear ratio change offers a significant improvement in corner exit speed and overall acceleration. Whether you're a dedicated track day participant or a spirited street driver, this gear set helps you unlock your vehicle's full potential by optimizing power delivery and reducing shift times.

By replacing the factory final drive ratio, the Cusco 4.556 gear set enhances your vehicle's responsiveness, allowing for quicker acceleration out of corners and improved overall performance. Designed with precision and durability in mind, this gear upgrade ensures reliable operation under demanding conditions, making it an ideal choice for those looking to elevate their driving experience without extensive modifications.

Key Features

The Cusco 4.556 Final Gear offers a range of technical benefits tailored for performance driving:

• Manufactured from high-strength steel with precise machining to ensure durability and longevity under aggressive driving conditions.
• Optimized gear ratio of 4.556, providing a notable increase in acceleration and corner exit speed compared to the stock ratio.
• Designed specifically for the Subaru BRZ, Scion FR-S, and Toyota 86 6-speed manual transmissions from 2013 to 2015 models.
• Engineered to improve throttle response and support increased performance capabilities on the track or spirited street driving.
• Manufactured by Cusco, a trusted name in performance drivetrain components, ensuring quality and reliability.
• Drop-in replacement that maintains factory shift feel and engagement, with no need for additional modifications or tuning.
• Ideal for drivers seeking faster acceleration, improved cornering performance, and a more engaging driving experience.

Construction & Design

The Cusco Final Gear is crafted from high-grade steel with meticulous machining processes to ensure precise gear tooth engagement and smooth operation. Its robust construction guarantees durability even under high-stress racing conditions. The gear set is designed as a direct replacement for the factory final drive, maintaining the original transmission's integrity while delivering enhanced performance. The gear ratio of 4.556 is carefully selected to balance acceleration and top speed, providing a significant performance boost without sacrificing drivability or reliability.

Manufactured with attention to detail, this gear set features a heat-treated surface to resist wear and ensure consistent performance over time. Its installation involves removing the existing final gear and replacing it with the Cusco unit, a process that can typically be completed with standard automotive tools and without the need for extensive modifications.

Installation & Fitment

The Cusco 4.556 Final Gear is a direct bolt-in upgrade for 2013–2015 Subaru BRZ, Scion FR-S, and Toyota 86 models equipped with a 6-speed manual transmission. The installation process involves removing the existing final drive gear and replacing it with the Cusco unit, which can typically be completed with standard automotive tools. No cutting, drilling, or extensive modifications are required, and the process can be performed by a qualified mechanic or experienced DIY enthusiast. It is recommended to inspect and replace the transmission fluid during installation to ensure optimal performance and longevity.

For best results, some drivers may choose to reprogram or tune their vehicle's ECU to optimize shift points and power delivery, although this is not mandatory.

What's Included

• Cusco 4.556 Final Gear set
• Installation hardware and instructions

Ideal For

This gear set is perfect for performance enthusiasts, track day drivers, and anyone looking to improve their vehicle's acceleration and cornering capabilities. It is especially beneficial for those who frequently participate in spirited driving or racing events, where quick acceleration and responsive handling are critical.