Exedy HF04 Lightweight Racing Flywheel Honda Civic Type R

The Exedy HF04 is a high-performance lightweight flywheel engineered for the 2017+ Honda Civic Type R FK8/FL5 with the K20C1 2.0L turbocharged engine. Designed to combine low weight, low inertia, and high thermal capacity, this flywheel delivers superior engine response for both street driving and motorsport applications including drag racing, autocross, and rally events.

Construction and Design:

• Manufactured from solid one-piece billet chromoly steel forging for exceptional strength and durability
• Weighs approximately 14.6 pounds for significant rotational mass reduction
• Gas nitrided surface treatment provides superior hardness and wear characteristics
• Integrated ring gear teeth eliminate the risk of separation found in aluminum flywheels
• Enhanced airflow design improves clutch cooling during high-performance driving
• 8-bolt crankshaft mounting configuration

Performance Benefits:

• Reduced rotational weight improves throttle response and acceleration
• Less engine power required to accelerate the flywheel means more power delivered to the wheels
• Compatible with Exedy Stage 1 Organic, Stage 2 Sports, and Stage 2 Racing clutches
• Resurfaceable design allows for extended service life when properly maintained
• SFI 1.1 certified and tested to withstand 15,000-18,000 RPM

This lightweight flywheel replaces the factory dual-mass flywheel with a solid single-mass design that prioritizes sports driving performance. Note that some additional drivetrain noise and vibration may be present compared to the stock dual-mass unit, which is normal for this type of performance upgrade. Sold individually.