Spec Clutch SB64S Steel Flywheel

The Spec Clutch SB64S Steel Flywheel delivers precision-engineered performance for demanding automotive applications. Manufactured from high-carbon billet steel using CNC machining to an exceptional .001" tolerance—ten times tighter than the industry standard of .010"—this flywheel ensures perfect balance and a flawlessly flat bedding surface for optimal clutch disc contact and engagement.

Key Features:

• High-carbon billet steel construction for durability and medium weight characteristics
• CNC machined to .001" tolerance for perfect balance and zero runout
• Replaceable steel friction plate made from friction-enhancing material for superior clutch bedding and holding power
• Rebuildable design extends service life and reduces long-term costs
• SFI certified for competitive racing environments
• Optimized moment of inertia (MOI) for improved power transfer and acceleration

The flywheel is the critical component that determines clutch performance and longevity. This Spec unit provides three essential functions: a consistent friction surface for the clutch disc, proper rotational inertia to optimize the power-to-acceleration ratio, and true balance at high RPM to eliminate power-robbing vibrations. The precision manufacturing process ensures smooth engine revolutions and maximum safety in competitive driving conditions, making it ideal for racing and high-performance street applications.