Spec Clutch SC17A Tuned Billet Aluminum Flywheel SFI 1.1 Internal Balance

The Spec Clutch SC17A is a tuned billet aluminum flywheel engineered for high-performance street and racing applications. Machined from aircraft-quality billet aluminum, this flywheel is a precision-engineered upgrade over OEM cast steel units, delivering a significant reduction in rotating mass for improved throttle response and faster engine revs.

Unlike generic lightweight flywheels, SPEC tuned billet flywheels are developed and optimized for specific vehicles and driving environments, taking into account how each application reacts to changes in rotating mass. The SC17A is compatible with OE or OE-based clutches, as well as SPEC sprung hub clutch kits.

Key Features:

• CNC machined to an industry-leading .001" tolerance — compared to the industry standard of .010" — ensuring perfect rotational balance and a flat, true bedding surface for the clutch disc
• SFI 1.1 certified for use in competitive and high-RPM racing environments
• Replaceable steel friction plate made from friction-enhancing steel formulated for optimum clutch bedding and holding power, making the unit rebuildable
• Internal engine balance design for proper crank mating with minimum runout
• 135-tooth ring gear for reliable starter engagement
• Diaphragm pressure plate style compatibility
• Weighs just 9.9 lbs — a lightweight option ideal for performance driving and racing
• Compatible with OE clutch or SPEC sprung hub clutch kits

The flywheel is precision ground to mate seamlessly to the crankshaft, providing a true, reliable friction surface compatible with a wide range of clutch disc materials. The lightweight aluminum construction reduces moment of inertia (MOI), helping maximize power delivery and acceleration response. The rebuildable design with a replaceable friction plate extends the service life of the unit, making it a cost-effective long-term investment for performance builds.