Spec Clutch SD06S Steel Flywheel SFI-Certified CNC Billet

The SPEC SD06S Steel Flywheel is CNC machined to an extraordinary .001" tolerance—ten times tighter than the industry standard of .010"—delivering perfect rotational balance and a precisely flat clutch disc bedding surface. All SPEC steel flywheels carry SFI certification, making them a trusted choice for competitive and high-performance driving environments.

Key Features:

• CNC Precision Machined to .001" tolerance for superior balance and surface flatness
• High Carbon Billet Steel construction for durability and optimal inertia characteristics
• SFI Certified for use in sanctioned racing and competitive applications
• Replaceable Steel Friction Plate specially formulated for optimum clutch bedding and holding power
• Rebuildable Design extends service life and reduces long-term cost
• Optimized Moment of Inertia (MOI) engineered to maximize power transfer and performance

The flywheel is the single most critical component influencing clutch performance and longevity. SPEC engineers design each flywheel's weight and dimensions to control inertia—the balance between power and acceleration—factoring in gear ratio, tire type, vehicle weight, and power output. The result is a flywheel that minimizes dimensional runout, eliminates power-robbing vibrations, and ensures smooth, consistent engine revolutions across the RPM range.

The SD06S steel flywheel offers a medium-weight inertia profile suited for a wide range of performance and racing applications. SPEC's extensive research and development into optimal flywheel geometry and MOI ensures this unit is engineered—not just manufactured—to maximize your vehicle's output.