ACT XACT StreetLite Flywheel 2004-2021 STI

DESCRIPTION

The ACT Streetlite Flywheel for the 2004-2021 STI is a lightweight, one-piece forged flywheel designed to improve engine response and acceleration while maintaining durability for long-term use. Significantly lighter than the factory flywheel, it uses carefully distributed material to reduce rotational inertia while preserving strength, rigidity, and heat tolerance under aggressive driving conditions.

Built from a heat-treated forging with induction-hardened ring gears, this flywheel is engineered for reliability in both street and drag racing applications. Its serviceable design allows for resurfacing without the need to purchase additional components, making it a practical performance upgrade that supports repeated clutch services over time.

WHY?

The Streetlite Flywheel is ideal for STI owners who want faster revving and sharper throttle response without sacrificing durability. Its reduced weight helps the engine accelerate more quickly, improving overall drivability and performance, while the one-piece construction eliminates common failure points found in multi-piece designs. Whether driven daily or pushed on the track, this flywheel delivers consistent performance and long service life.

FEATURES:

• Noticeably improved engine response and acceleration

• OE to mild gear rattle

• Heat-treated forged construction for strength and toughness

• Induction-hardened ring gears for extended service life

• One-piece design for uniform heat transfer and reduced failure points

• Serviceable and resurfaceable without additional parts

COMPATIBILITY

2004-2021 STI

SPECIFICATIONS