Spec Clutch SZ375 Stage 5 Performance Clutch Kit - Sintered Iron Full-Face Disc

The SPEC SZ375 Stage 5 Clutch Kit is SPEC's most aggressive single-disc clutch offering, engineered for heavily modified drag race and pulling applications demanding maximum grip and torque transfer. Featuring a full-metallic sintered iron disc with the highest available friction coefficient in the SPEC lineup, this kit delivers uncompromising holding power for extreme performance builds. While technically street-drivable, the Stage 5's harsh engagement characteristics make it best suited for dedicated race use.

Key Features:

• Full-metallic sintered iron friction material — highest possible friction coefficient for maximum torque capacity
• High-clamp pressure plate for superior clamping force under extreme load
• Solid 12-rivet unsprung hub disc assembly — rigid iron construction for direct, unforgiving power transfer
• Heat-treated assembly for enhanced strength and long-term durability under race conditions
• 9.500 in. (241 mm) disc diameter with 23-spline, 1.031 in. input shaft fitment
• Bearing and tool kit included for complete installation
• Ideal for drag racing, tractor pulling, and autocross applications

Specifications:

• Disc Diameter: 9.500 in. (241 mm)
• Input Spline Count: 23
• Input Shaft Diameter: 1.031 in.
• Disc Quantity: 1
• Flywheel Included: No
• Hub Style: Full-face / Unsprung (Rigid)
• Friction Material: Sintered Iron

The SPEC Stage 5 is recommended for race-only or heavily modified performance vehicles. Due to its aggressive engagement profile, it is not recommended for daily street driving. For best results, this kit should be spec'd in consultation with a SPEC technical advisor to ensure proper configuration for your application and power level.