Spec Clutch SD111 Stage 1 Clutch Kit - High Clamp Organic Performance Clutch

The Spec Clutch SD111 Stage 1 Clutch Kit is engineered for bolt-on naturally aspirated engines and mildly modified forced induction applications. Designed to deliver stock-like daily drivability with a meaningful performance upgrade over OEM, the Stage 1 is the ideal choice for drivers who demand both streetability and the capability to handle spirited driving across a wide range of motorsport disciplines.

Key Features:

• High clamp pressure plate — delivers increased clamping force over stock for improved torque transfer and reduced slip
• Steel-backed, multi-compound woven organic disc — integrally bonded steel backing provides strength under high clamp loads and elevated temperatures while maintaining smooth, predictable engagement
• High torque sprung hub assembly — double-sprung hub design with spring cover reliefs for flexibility and heat-treated components for long-term strength and durability
• Complete kit — includes pressure plate, clutch disc, throwout bearing, and alignment tool for straightforward installation
• Designed and hand-built in the U.S.A. — manufactured to exacting tolerances for consistent quality and performance

Intended Use:

• Street
• Drag Racing
• Drifting
• Road Racing
• Rallye
• Pulling
• Autocross

The Stage 1 clutch kit offers excellent wear characteristics and outstanding longevity, making it an ideal replacement or first-step performance upgrade. A proper break-in period of at least 500 miles of primarily city and stop-and-go driving is recommended before full-throttle engagement or aggressive launching to ensure optimal clutch performance and preserve warranty coverage.