Lightweight Flywheel by Exedy EXEDY Lightweight Flywheels combine low weight, low inertia and high thermal capacity. They are designed for light to moderately 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 and steel. Newly available are lightweight, solid replacements for vehicles fitted with OE dual mass flywheels. EXEDY lightweight 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. Features Product Weight (lbs.) : 19.6 Made from either forged or billet chromoly steel 15,000-18,000 RPM Specifically designed to reduce weight and inertia Benefits Excellent strength to weight ratio Stronger and harder than standard 1020 steel Improves the cooling of the clutch Better engine response Please Note: All EXEDY Racing Lightweight Flywheels carry SFI 1.1 Certification. Which means, when you buy these products, you can be confident they are certified for use in competitive motorsports. Applications 2009-2015 Nissan 370Z 2008-2013 Infiniti G37 2007-2008 Infiniti G35 2003-2009 Nissan 350Z What\’s In The Box? 1 – Lightweight Flywheel Warranty Exedy 60-Day Limited Warranty