ACT® (04-21) WRX STI XACT Flywheel Prolite
ACT® (04-21) WRX STI XACT Flywheel Prolite
ACT® (04-21) WRX STI XACT Flywheel Prolite
ACT® (04-21) WRX STI XACT Flywheel Prolite


ACT® (04-21) WRX STI XACT Flywheel Prolite

Regular price$420.00
Shipping calculated at checkout.
  • In stock, ready to ship
  • Question? Call us at (888) 257-1077 🏁
  • Free Shipping USA (Exc. HI, AK, PR)

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Verify fitment with your vehicle

(Change vehicle)

Compatible: (2.5L)

2004 - 2021 Subaru WRX STI  



600240 is a Prolite flywheel, which is ACT's lighter flywheel offering with lowest inertia. Prolite flywheels are designed for best throttle response and acceleration. Prolite flywheels are preferred for road racing or rally racing, and have reduced drivability. Materials are properly distributed for maximum strength, good heat tolerance and rigidity. ACT flywheels are serviceable and can be resurfaced with no need to purchase additional parts.

Feel Dramatically improved engine response and acceleration, mild to moderate gear rattle
Life Heat-treated forging for strength and toughness, induction-hardened ring gears for maximum life
Quality One piece construction allows less opportunity for failure and provides uniform efficient heat transfer from the clutch disc. No more warped inserts or loose ring gears
Recommended Use Recommended for race use
ACT Difference Forged, CNC machined and dynamically computer balanced for smooth high RPM reliability



Item Description XACT Flywheel Prolite
Product Weight (lbs.) 11.8
Material Chromoly Steel
Flywheel Type Prolite
Tooth Quantity 124
Warranty 12 Months 
SFI 1.1

Install Guide: