ACT Streetlite Steel Flywheel 2004-2021 STI Limited Edition

Description

ACT Streetlite Steel Flywheel 2004-2021 STI | Performance Enhancement | Drivetrain Upgrade

Overview

The ACT Streetlite Steel Flywheel is a high-quality upgrade designed specifically for Subaru WRX STI models from 2004 to 2021. This performance-oriented flywheel reduces rotational mass, resulting in quicker throttle response, more precise engine engagement, and smoother acceleration—ideal for enthusiasts who want to optimize their daily driver or spirited street car. Crafted from hot-forged chrome-moly steel, it offers superior strength and heat tolerance compared to OEM cast flywheels, ensuring durability under demanding driving conditions.

Built with a focus on engineering excellence, the ACT Streetlite Flywheel features precision CNC machining and dynamic computer balancing. This meticulous manufacturing process guarantees high RPM stability and long-lasting reliability, making it a dependable choice for Subaru owners who demand performance without sacrificing safety or daily drivability. Its design lowers inertia while maintaining rigidity, providing a noticeable improvement in engine response and overall drivetrain feel. Whether you’re tuning for more power or simply upgrading your OEM component, this flywheel enhances the driving experience for Subaru enthusiasts who value quality and performance.

By reducing the rotational mass, this flywheel allows your STI to rev more freely, translating into quicker acceleration and more responsive throttle control. Its compatibility with stock and aftermarket clutches makes it a versatile upgrade for those looking to improve engagement and durability. Perfect for street-driven Subarus, the ACT Streetlite Steel Flywheel offers a reliable, high-performance solution that elevates your vehicle’s drivetrain dynamics without compromising everyday usability.

Features & Specifications

This ACT Streetlite Steel Flywheel is engineered for Subaru WRX STI models and features a hot-forged chrome-moly steel construction, delivering increased strength and heat resistance for demanding street driving and tuning applications.

• Brand: ACT
• Product: Streetlite Steel Flywheel 2004-2021 STI
• Part Number: (Refer to product details for specific part number)
• Fitment: Subaru WRX STI (2004-2021)
• Material: Hot-forged chrome-moly steel
• Finish: Natural steel with protective coating
• Construction: CNC machined and computer-balanced
• Origin: Made in the USA

Key Benefits

• Enhanced Throttle Response: Reduces rotational mass for quicker engine revving and more immediate power delivery, improving street driving feel.
• Durability & Heat Tolerance: Constructed from high-strength chrome-moly steel, offering superior heat resistance and longevity under spirited driving conditions.
• Reliable Fitment: Precisely CNC-machined with high RPM stability, ensuring a seamless upgrade for your STI without compatibility issues.
• Improved Drivetrain Engagement: Lower inertia enhances clutch engagement and overall driving feel, making shifts smoother and more predictable.
• OEM Replacement Quality: Designed to match or exceed OEM standards, providing peace of mind for daily drivers and performance enthusiasts alike.

What’s Included

• 1× ACT Streetlite Steel Flywheel
• Installation hardware (if included in kit)
• Installation instructions

Installation & Compatibility

Installing the ACT Streetlite Steel Flywheel is a straightforward process for experienced DIY enthusiasts with basic mechanical skills. However, due to the importance of proper clutch engagement and drivetrain balance, professional installation is recommended. The flywheel is a direct bolt-on replacement for OEM units on Subaru WRX STI models from 2004 to 2021, ensuring a perfect fitment and reliable performance. Tuning your ECU or clutch setup may be beneficial to maximize the benefits of reduced rotational mass and to ensure optimal drivability. Always verify compatibility with your specific vehicle year and trim before installation.