Spec Clutch SF384 Stage 4 Performance Clutch Kit - Carbon Graphite Puck Disc

The SPEC SF384 Stage 4 Clutch Kit is a high-performance racing clutch designed for heavily modified engines where maximum torque capacity, instantaneous engagement, and reduced rotating mass are critical. Built as a solid hub evolution of the Stage 3, this kit delivers uncompromising performance on the track.

Solid Hub Design: Unlike the sprung-hub Stage 3, the Stage 4 uses a solid 8-rivet hub assembly that is heat-treated for superior strength and durability under extreme loads. This rigid construction enables faster, more direct power transfer — ideal for race applications where engagement speed matters.

Puck Configuration Options: The SF384 is available in 3, 4, or 6-puck carbon graphite friction disc configurations to suit different racing disciplines:

• 3-Puck: Lightest option — ideal for weight-sensitive builds
• 4-Puck: Best all-around compromise between weight and engagement smoothness
• 6-Puck: Smoothest engagement of the three; marginally street-drivable, though not recommended for daily use due to the rigid hub

Key Features:

• High-clamp performance pressure plate for increased clamping force
• Carbon graphite friction material for aggressive, consistent engagement
• High-torque solid hub and disc assembly
• SFI-approved components
• Made in the USA
• Includes release bearing and installation tool kit

Recommended Driving Disciplines: Drag Racing, Road Racing, Rallye, Drifting, Pulling, Circle Track

Important Note: The Stage 4 is a race-only clutch. Due to its rigid hub design, it is not suitable for street or daily driving use. Stages 1–3+ are recommended for street/strip applications.