Exedy Lightweight Chromoly Flywheel (Subaru WRX / STi 2002-2008)
EXEDY flywheels combine low weight, low inertia and high thermal
capacity. They are designed for lightly tuned racing cars for drag racing,
autocross and rally events, as well as street usage. They are made from
solid one-piece billet chromoly steel or chromoly steel forgings. They
are specifically designed to reduce weight and inertia for better engine
response. Most incorporate special design features to enhance the
airflow which improves the cooling of the clutch. The ring gear teeth are
integrated onto the flywheel unlike an aluminum flywheel where the ring
gear is pressed onto the flywheel and has the possibility of separating
from the flywheel due to the different expansion coefficients of aluminum
versus steel. EXEDY steel billet and forged steel flywheels have passed
engineering tests to 15,000-18,000 rpm. They are guaranteed not to fail to
the said rpm, and are all SFI approved.
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