F1 Racing Chromoly Flywheel 51026FX-HT Ultra heavy-duty and weighs only 18 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 any clutch including Exedy, ACT, Fidanza, Clutchmasters, and other OEM clutch kits