Spec Clutch SD02A Aluminum Flywheel SFI Certified Billet

The SPEC SD02A Aluminum Flywheel is CNC machined to an exceptional .001" tolerance — ten times tighter than the industry standard of .010". This precision manufacturing ensures perfect rotational balance and a perfectly flat clutch disc bedding surface, delivering superior performance and safety in both street and competitive racing environments. All SPEC flywheels carry SFI certification for sanctioned motorsport use.

Key Features:

• CNC Machined Precision: Manufactured to .001" tolerance for perfect balance and minimal dimensional runout
• Aircraft-Quality Billet Aluminum Construction: Lightweight design reduces rotational mass for faster engine response and acceleration
• Replaceable Steel Friction Plate: Features a friction-enhancing steel insert specially formulated for optimal clutch bedding and holding power
• Rebuildable Design: Replaceable friction surface extends service life and reduces long-term ownership costs
• SFI Certified: Meets SFI specifications for use in sanctioned racing and competitive environments
• Optimized Moment of Inertia (MOI): SPEC-engineered flywheel weight and dimensions maximize power transfer and acceleration for your application

The flywheel is the single most important component for optimizing clutch performance and longevity. SPEC aluminum flywheels are engineered to deliver three critical functions: a consistent, friction-enhancing surface for the clutch disc; proper rotational inertia tuned to your vehicle's power output and gear ratios; and true dimensional balance at high RPM to eliminate harmful vibrations. The SD02A is crafted from aircraft-quality billet aluminum, making it an ideal lightweight option for performance driving and racing applications where reduced rotational mass translates directly into faster throttle response and quicker acceleration.