Spec Clutch SZ155 Stage 5 Race Clutch Kit - Full-Metallic Sintered Iron Disc

The Spec Clutch SZ155 Stage 5 Clutch Kit is SPEC's most aggressive single-disc clutch offering, engineered specifically for high-powered drag racing applications and builds that demand a slipper clutch or progressive torque-induced engagement. This is a race-purpose clutch — not intended for street driving — and delivers the maximum friction and clamping force available in SPEC's single-disc lineup.

Key Features:

• Full-metallic sintered iron disc with the highest available friction coefficient for maximum torque transfer
• Rigid, unsprung iron disc assembly with instant, strong engagement
• High-clamp pressure plate with adjustability available on select applications
• Solid 12-rivet hub — heat-treated for strength and durability
• SFI approved kit for sanctioned racing applications
• Includes pressure plate, iron disc, release bearing, and installation tool kit

Intended Use:

• Drag racing
• Pulling competitions
• Slipper clutch / progressive torque-induced engagement applications

Important Notes: The Stage 5 is SPEC's strongest single-disc clutch and is built to order. Due to the rigid iron disc and high-clamp pressure plate, engagement is harsh and immediate — this kit is not recommended for street driving. For best results, this clutch should be configured to your specific application with input from a SPEC technical representative prior to ordering.