ACT Prolite Flywheel for 2004+ STi (600240) Engine Cover Updated Oct 2025:

Updated Oct 2025:

• Fits OEM Evo 4 valve covers with build dates from October 1996+

Dress-up your engine with carbon fiber

Diagram reference number 52350

* These can be used with the 2G DSM if you've moved your coil pack and want the longer 1G wires

ACT Prolite Flywheel for 2004+ STi (600240) Engine Cover Updated Oct 2025:The XACT Prolite flywheel weighs only 11. 8 pounds offering the lowest inertia, best throttle response and acceleration making them the preferred flywheel for road or rally racing. Fits all 2004 2021 Subaru STi manual transmission models. Vehicle Fitment: 2004 2021 Subaru STi Need Flywheel Bolts? OEM Subaru Bolts (800610740) ARP Flywheel Bolts (254 2801) More Info: The XACT Prolite flywheel is ACT's lighter flywheel offering with lowest inertia.