Spec Clutch SC36A-3 Aluminum Flywheel SFI-Certified CNC Billet

The Spec Clutch SC36A-3 is an aircraft-quality billet aluminum flywheel engineered for performance and racing applications. CNC-machined to an exceptional .001-inch tolerance—ten times tighter than the industry-standard .010—this flywheel delivers perfect rotational balance and a precisely flat clutch disc bedding surface. All Spec flywheels carry SFI certification, making this unit a trusted choice for sanctioned competitive events.

Key Features:

• Aircraft-quality billet aluminum construction for a lightweight, high-strength design
• CNC-machined to .001-inch tolerance — far exceeding the industry standard of .010
• SFI certified for use in sanctioned racing environments
• Replaceable steel friction plate made from a specially formulated friction-enhancing alloy for optimal clutch bedding and holding power
• Rebuildable design extends service life and reduces long-term cost
• Optimized Moment of Inertia (MOI) tuned through extensive R&D for maximum power transfer and acceleration
• Zero dimensional runout eliminates engine-damaging vibrations and ensures smooth, high-rpm operation

The flywheel plays three critical roles in drivetrain performance: providing a consistent, friction-enhancing surface for the clutch disc; contributing the correct rotational inertia to balance power delivery and acceleration; and maintaining true rotational balance at all engine speeds. Spec's aluminum flywheel addresses all three with precision engineering and purpose-built materials.

Spec invests heavily in research and development to determine ideal flywheel dimensions and weights across all driving disciplines. The result is a flywheel that can be optimized for your specific MOI requirements—whether you're building a dedicated track car or a high-performance street machine—helping you extract maximum output from your powertrain.