Spec Clutch SV87S-4 Steel Flywheel High Performance Racing Flywheel

The SPEC SV87S-4 is a high-performance steel flywheel engineered for racing and high-performance street applications. Precision CNC-manufactured from high-carbon billet steel to an exceptional .001" tolerance—ten times tighter than the industry standard of .010"—this flywheel ensures perfect balance and optimal clutch disc bedding for maximum power transfer and safety in competitive environments.

Key Features:

• High-carbon billet steel construction for durability and consistent performance
• CNC-machined to .001" tolerance for perfect balance and true rotational accuracy
• SFI certification for racing safety compliance
• Replaceable steel friction plate with friction-enhancing surface for optimal clutch holding power
• Rebuildable design for long-term value
• Medium-weight inertia optimized for power transfer and acceleration
• Perfectly flat bedding surface eliminates power-robbing vibrations

Performance Benefits:

SPEC flywheels are engineered to maximize three critical aspects of power transfer: consistent friction surface for clutch engagement, optimized moment of inertia (MOI) for your specific application, and true rotational balance to eliminate engine-damaging vibrations. The precision manufacturing process ensures smooth engine revolutions and allows for aggressive clutch engagement without chatter or slippage. The steel construction provides ideal inertia characteristics for balanced acceleration and drivability across various racing disciplines and performance street applications.

This flywheel's rebuildable design features a replaceable friction plate, allowing you to refresh the friction surface without replacing the entire flywheel, providing long-term cost savings and consistent performance throughout its service life.