Spec Clutch SA01AB Aluminum Flywheel SFI Certified CNC Billet

The Spec Clutch SA01AB is a high-performance billet aluminum flywheel engineered for competitive motorsport and performance driving applications. CNC machined to an exceptionally tight .001-inch tolerance — ten times more precise than the industry-standard .010 tolerance — this flywheel delivers perfect rotational balance and a perfectly flat clutch disc bedding surface. All Spec aluminum flywheels carry SFI certification, making them a trusted choice for sanctioned racing environments.

Key Features:

• CNC manufactured to .001 tolerance for superior balance and surface flatness
• SFI certified for sanctioned competitive and race use
• Constructed from aircraft-quality billet aluminum for lightweight performance
• Features a replaceable steel friction plate made from friction-enhancing steel specially formulated for optimum clutch bedding and holding power
• Rebuildable design — friction plate can be replaced to restore like-new performance
• Engineered for optimum Moment of Inertia (MOI) to maximize power transfer and acceleration
• Zero dimensional runout to eliminate engine-damaging vibrations and power-robbing harmonics

The flywheel plays a critical role in three areas of drivetrain performance: providing a consistent friction surface for the clutch disc, managing rotational inertia to optimize power-to-acceleration ratios, and maintaining true rotational balance at all RPM levels. Spec's aluminum flywheel reduces rotating mass for quicker engine response and faster rev changes, making it ideal for road racing, autocross, and high-performance street use.

Spec invests heavily in research and development to optimize flywheel dimensions and weight for specific vehicle applications, ensuring the SA01AB delivers the ideal MOI for maximum output across the powerband.