Spec Clutch SM885-2 Stage 5 Sintered Iron Performance Clutch Kit

The SPEC SM885-2 Stage 5 Clutch Kit is a full-race-grade clutch system engineered for heavily modified and competition-built engines. Featuring a full-metallic sintered iron friction disc, this kit delivers the highest possible friction coefficient available in SPEC's clutch lineup, making it the go-to choice for drag racing, pulling, and other high-demand motorsport applications.

The Stage 5 disc uses a full-face, unsprung rigid iron assembly with a solid hub reinforced by 12 rivets. Every assembly is heat-treated for maximum strength and long-term durability under extreme thermal and mechanical stress. The included high-clamp diaphragm pressure plate delivers aggressive clamping force to handle serious power levels without slippage.

Kit Includes:

• High-clamp diaphragm pressure plate
• Full-face sintered iron clutch disc with solid, unsprung hub
• Throwout bearing
• Alignment tool

Key Specifications:

• Disc Material: Sintered iron (full-metallic)
• Disc Style: Full face / Unsprung hub
• Hub Style: Solid with 12 rivets, heat-treated
• Pressure Plate Style: Diaphragm (high-clamp)
• Input Spline Quantity: 20
• Input Shaft Diameter: 0.875 in.
• Flywheel Included: No

Intended Use: Drag racing and pulling competition. Not recommended for street use — the sintered iron friction material produces harsh, aggressive engagement characteristics that are incompatible with normal street driving conditions.