XClutch Chromoly Flywheel - 2004-2022 Subaru WRX STi / Type RA 2.5L

Upgrade your WRX STi's drivetrain with the XClutch chromoly flywheel. Engineered from high-strength chromoly steel, this lightweight flywheel delivers improved throttle response, faster revving, and enhanced performance for both street and motorsport applications. Designed specifically for the 2004-2022 Subaru WRX STi and Type RA models.

Key Features:

• High-strength chromoly steel construction for maximum durability
• Lightweight design reduces rotational mass for improved performance
• Integral ring gear included - ready to install
• Timing sensor ring included (if applicable to your model)
• Precision-machined friction surface for optimal clutch engagement
• Designed for both street and motorsport applications
• Compatible with stock and aftermarket clutches
• XClutch quality engineering with 30+ years of experience

Performance Benefits:

• Improved Throttle Response: Reduced rotational mass allows engine to rev more freely
• Faster Acceleration: Less weight to spin up means quicker acceleration
• Better Shifting: Lighter flywheel makes rev-matching easier and more precise
• Enhanced Performance: Ideal for track days, autocross, and spirited driving
• Durable Construction: Chromoly steel withstands high-stress motorsport use
• Weight Reduction: Lighter than factory dual-mass or single-mass flywheels

Specifications:

• Brand: XClutch
• Part Number: XFSU003C
• Material: Chromoly steel
• Ring Gear: Integral (included)
• Timing Sensor Ring: Included (if applicable)
• Weight: 18.7 lbs
• Barcode: XFSU003C

Fitment Information:

• Compatible Vehicles:
• 2004-2007 Subaru WRX STi (EJ257)
• 2008-2014 Subaru WRX STi (EJ257)
• 2015-2021 Subaru WRX STi (EJ257)
• 2018-2021 Subaru WRX STi Type RA (EJ257)
• 2022 Subaru WRX STi (EJ257)
• Note: Designed specifically for 2.5L EJ257 engine applications

What's Included:

• XClutch chromoly flywheel
• Integral ring gear (pre-installed)
• Timing sensor ring (if applicable to your model)
• Installation instructions

Installation Notes:

• Professional installation strongly recommended
• Transmission removal required for installation
• Installation time: approximately 6-8 hours
• Flywheel surface is pre-machined and ready to install
• Use new flywheel bolts (not included - use OEM or ARP)
• Torque flywheel bolts to Subaru specifications
• Compatible with stock and aftermarket clutches
• Break-in period: 500 miles of moderate driving recommended

Why Chromoly Steel?

Chromoly (chromium-molybdenum) steel is an alloy known for its exceptional strength-to-weight ratio. It's significantly stronger than standard steel, allowing XClutch to reduce flywheel weight while maintaining the structural integrity needed for high-performance and motorsport applications. Chromoly is the material of choice for professional racing teams and serious enthusiasts who demand the best.

Lightweight Flywheel Advantages:

Reducing rotational mass in the drivetrain has multiple performance benefits. A lighter flywheel allows the engine to rev more freely, improving throttle response and acceleration. This is especially noticeable during gear changes, where the engine can match revs more quickly for smoother, faster shifts. The reduced inertia also makes the car feel more responsive and engaging to drive.

Why XClutch?

XClutch is an Australian engineering company with over 30 years of clutch and flywheel development experience. Their products are designed using advanced materials and manufacturing processes to deliver exceptional performance, reliability, and durability. XClutch flywheels are trusted by top motorsport teams and tuners worldwide for both street and competition use.

Street vs. Motorsport Use:

This chromoly flywheel is designed to excel in both street and motorsport applications. For street use, it provides improved throttle response and a more engaging driving experience without sacrificing drivability. For track use, the lightweight design and high-strength construction deliver the performance and durability needed for sustained high-RPM operation and aggressive driving.

Clutch Compatibility:

The XClutch chromoly flywheel is compatible with both stock and aftermarket clutches. Whether you're running the factory clutch or upgrading to a performance clutch kit, this flywheel provides the ideal foundation for your drivetrain. The precision-machined friction surface ensures optimal clutch engagement and longevity.

Perfect For: WRX STi owners looking to improve throttle response, track day enthusiasts, autocross competitors, rally drivers, or anyone seeking enhanced drivetrain performance and reduced rotational mass.

Pro Tip: When installing a new flywheel, it's the perfect time to upgrade your clutch as well. Consider pairing this flywheel with an XClutch performance clutch kit for maximum performance and reliability.

Note: Lightweight flywheels may cause slight idle vibration compared to dual-mass flywheels. This is normal and does not affect performance or reliability.

Upgrade your Subaru WRX STi with XClutch's premium chromoly flywheel - engineered for performance, built for reliability.