5.9L 360 Magnum Engine (1993-01)- Centerforce - Steel - 130 Tooth Centerforce® Flywheels both billet steel and aluminum for popular Domestic and import auto and truck applications can now be used in racing. ALL CENTERFORCE® FLYWHEELS HAVE SFI CERTIFICATION The best way to complement your Centerforce clutch is to use it with a Centerforce flywheel. The flywheels are made of either aluminum or steel. They are available for most applications. Aluminum flywheels are not recommended for street applications.