Thank you. You have rated this product.
Light weight Miata flywheels keep less inertia in storage but the lighter rotating mass provides significantly improved engine response and acceleration characteristics.
XACT Miata flywheels are certified by ACT to meet SFI Spec. 1.1. This makes the XACT Miata Flywheel legal for competition when SFI Spec. 1.1 is required or recommended. The XACT Miata flywheel comes complete with official SFI sticker and serial number as required for certification.
ACT offers what performance enthusiasts need: the benefits of a premium quality light weight aluminum Miata flywheel at a MORE affordable price...in steel.
ACT currently manufactures the XACT steel Miata flywheel in two versions, ProLite (9 Pounds) for road racing and autocross applications and very quick throttle response, and slightly heavier StreetLite (13 Pounds) for street and drag racing vehicles which may require more inertia. Both ProLite 600255 and StreetLite 600290 Miata flywheels are precision made from Chrome-moly forgings and feature an induction hardened integral ring gear. All ProLite and StreetLite flywheels are CNC machined, heat treated for strength and precision balanced. Substantial material is left behind the clutch surface area for better heat dissipation and durability while weight savings is made where it matters the most for reduced inertia.