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The SPEC 12 lb aluminum flywheel is a lightweight replacement for 2003–2007 Mazda RX-8 models, part number 351-11-521. It requires the Mazda factory counterbalance to install. As a lighter flywheel, it reduces rotating mass to help the engine respond and rev more quickly, making it suitable for drivers seeking crisper throttle response while retaining necessary balance for RX-8 applications.
Spec 03-07 Mazda RX-8 12lb Aluminum Flywheel (requires Mazda counterbalance; p/n 351-11-521)
