Spec Clutch SD925 Stage 5 Performance Clutch Kit - Sintered Iron Full-Face Disc

The SPEC SD925 Stage 5 Clutch Kit is SPEC's most aggressive single-disc clutch offering, purpose-built for high-output drag racing, competitive pulling, and other extreme-performance applications. Sintered iron, full-face friction material delivers the highest possible friction coefficient in a full-faced disc configuration, enabling maximum torque transfer under race conditions.

Key Features:

• Full-metallic sintered iron friction disc — highest available friction coefficient for maximum torque capacity
• High-clamp pressure plate — delivers the clamping force required for heavily modified, high-torque engines
• Solid 12-rivet hub assembly — heat-treated for exceptional strength and durability under sustained high-load use
• Full-faced, unsprung hub disc design — rigid iron assembly with progressive torque-induced engagement characteristics
• 10-spline input shaft compatibility — 1.250 in. input shaft diameter (verify application fitment)
• Bearing and alignment tool kit included
• Flywheel not included

Intended Use:

• Drag racing
• Competitive truck and tractor pulling
• Slipper clutch / progressive engagement applications

Important Note: The Stage 5 is street-drivable but not street-friendly due to its aggressive metallic engagement characteristics. For best results, this kit should be configured and ordered with input from a SPEC technical representative based on your specific vehicle and application requirements.