Comp Clutch 2004-2011 Subaru STI 15lb Steel Flywheel

Part Details:

The Competition Clutch forged lightweight steel flywheel is designed for naturally aspirated and street-driven applications where improved engine response is desired without sacrificing drivability. It is compatible with all stock and performance clutch assemblies, allowing it to be used across a wide range of builds.

By reducing overall rotating mass while preserving low-end torque, this flywheel supports quicker acceleration and responsive throttle behavior. The design focuses on maintaining predictable engagement and smooth operation, making it suitable for daily-driven vehicles as well as moderate performance setups.

Constructed from forged 4140 steel, the flywheel features a one-piece ring gear for increased durability. It is CNC machined and balanced to OEM specifications to ensure proper fitment, consistent clutch engagement, and long-term reliability.

Key Features

• Forged lightweight steel flywheel construction
• Preserves low-end torque and street drivability
• Compatible with all stock and performance clutch assemblies
• One-piece ring gear for increased durability
• Weight ranges from 11 lbs. to 14 lbs. depending on application
• Well suited for Stage 1 and Stage 2 clutch kits
• Manufactured from stamped 4140 steel under high pressure and heat
• CNC machined and balanced to OEM specifications

What’s Included

• Competition Clutch forged lightweight steel flywheel
• Integrated one-piece ring gear
• Application-specific fitment design

Frequently Asked Questions (FAQ)

Is this flywheel suitable for daily driving?
Yes. It is designed for street-driven vehicles and maintains drivability while improving throttle response.

Will this flywheel work with stock clutch assemblies?
Yes. It is compatible with both OEM and aftermarket performance clutch systems.

How does reduced mass affect acceleration?
Reducing rotating mass allows the engine to rev more freely, which can improve throttle response and acceleration.

Is this flywheel intended for high-power builds?
This flywheel is best suited for naturally aspirated and moderate performance applications, including those using Stage 1 or Stage 2 clutch kits.

Does this flywheel meet safety standards?
Yes. It meets and exceeds SFI 1.5 specifications.

Related Drivetrain Components

• Clutch Kits – often paired with flywheels to ensure proper fitment, engagement, and torque capacity.
• Transmission Mounts – help limit drivetrain movement, which can affect clutch engagement and flywheel performance under load.
• Shifters – can benefit from reduced rotational mass when combined with lightweight flywheels.
• Shifter Bushings – improve shift precision and complement drivetrain upgrades involving flywheel changes.
• Drivetrain Components – browse additional parts that support consistent power transfer and drivetrain reliability.