Spec Clutch SD415 Stage 5 Clutch Kit - Full-Metallic Sintered Iron Disc

The SPEC SD415 Stage 5 Clutch Kit is SPEC's highest-performance single-disc clutch solution, engineered specifically for extreme motorsport applications including drag racing, sled pulling, and high-output competition engines. Built around a full-metallic sintered iron disc with the highest possible friction coefficient, this kit delivers maximum torque capacity where nothing less will do.

The Stage 5 disc assembly uses a solid 12-rivet rigid hub that is heat-treated for exceptional strength and durability under extreme load conditions. Paired with a high-clamp pressure plate — adjustable on select applications — this kit provides aggressive, positive engagement suited to race-only environments. Due to the nature of the full-metallic friction material, this clutch is not recommended for street use and is intended for dedicated drag, pulling, and competition applications only.

Kit Includes:

• High-clamp pressure plate (adjustability available on select applications)
• Full-metallic sintered iron rigid disc assembly
• Release bearing
• Alignment tool

Key Features:

• Full-metallic disc with maximum friction coefficient for peak torque transfer
• Solid 12-rivet heat-treated hub for extreme durability
• High-clamp load pressure plate for firm, race-ready engagement
• Supports progressive torque-induced and slipper clutch engagement styles
• Ideal for drag racing and pulling applications
• Race use only — not street friendly

Note: For best results, the SPEC Stage 5 is recommended to be ordered as a custom-configured unit. Consult a SPEC technical representative with details about your specific build and intended use before ordering.