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The ACT XACT Prolite Flywheel (600240) is designed for the 2004-2021 Subaru STI. This Prolite flywheel is ACT's lightest offering, providing the lowest inertia for the best throttle response and acceleration. Ideal for road racing or rally racing, it features reduced drivability. The materials are properly distributed to ensure maximum strength, good heat tolerance, and rigidity. ACT flywheels are serviceable and can be resurfaced without the need for additional parts.

Fitment:

2007 Subaru Legacy GT spec.B (6-Speed)
2004-2021 Subaru WRX STI  

Detailed Fitment:

  • WRX STi 2015-2021
  • WRX 2015-2021
  • Impreza WRX 2002-2014

Technical details:


Engine Response: Dramatically improved

Acceleration: Enhanced
Gear Rattle: Mild to Moderate
Construction: Heat-treated forging for strength and toughness, induction-hardened ring gears for maximum life
Design: One-piece construction for uniform heat transfer and reduced failure points
Recommended Use: Race use, Manufacturing: Forged, CNC machined, and dynamically computer balanced for smooth high RPM reliability


Install Guide:


Ensure the vehicle is securely lifted and the transmission is removed.

Replace the old flywheel with the ACT XACT Prolite Flywheel, ensuring proper alignment.
Reassemble the transmission and lower the vehicle. Follow the manufacturer's torque specifications for all bolts.


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