ACT Prolite Steel Flywheel (600240) | Subaru STI 2004-2021

The ACT Prolite Steel Flywheel (600240) is engineered for 2004–2021 Subaru STI owners seeking a lightweight, high-strength flywheel that improves throttle response, rev matching, and overall engine performance. By reducing rotational mass while maintaining durability, this Prolite flywheel enhances clutch engagement, engine spool, and drivability for street, autocross, or light track use.

KEY FEATURES

• High-strength steel construction reduces rotational mass while ensuring long-term durability
• Prolite design optimized for faster rev transitions, improved throttle response, and smooth clutch engagement
• Direct-fit replacement compatible with OEM flywheel and clutch components
• Enhances engine responsiveness and overall drivability for both street and track applications
• Compatible with stock and performance clutch systems for STI applications
• Professional-grade construction ensures consistent performance under repeated load cycles

TECHNICAL SPECIFICATIONS

• Platform Compatibility: Subaru STI 2004–2021
• Flywheel Type: Prolite Steel Flywheel
• Material: High-strength steel for durability and reduced rotational mass
• Torque Capacity: Supports up to 550 lb-ft (verified for 600240 configuration)
• Horsepower Support: Up to 600 HP (verified for 600240 configuration)
• Installation: Direct-fit replacement using OEM crankshaft and clutch bolt patterns
• Performance Benefit: Reduced rotational mass, quicker rev transitions, improved throttle response, and enhanced clutch feel

VEHICLE FITMENT

• Subaru STI 2004–2021

ACT delivers proven, data-driven performance solutions engineered to optimize your Subaru with unmatched precision and reliability.