F1 Racing Chromoly Flywheel 56029FX-HT Ultra heavy-duty and weighs only 11.4 lbs Meets or exceeds SFI 1.1 specification Made from 4140 forged chromoly steel (2X stronger than billet steel) Incorporates special design features to enhance the airflow for improved clutch cooling Works with every clutch including Exedy, ACT, Fidanza, Clutchmasters, and other direct replacement clutch kits