Spec Clutch SMD663 Stage 3 Replacement Clutch Disc

The SPEC SMD663 is a Stage 3 replacement clutch disc featuring a carbon semi-metallic 6-puck sprung hub design engineered for high-performance applications. This unit is designed for street and race cars that require an aggressive but streetable engagement and high torque capacity, making it an ideal choice for enthusiasts who demand both performance and drivability.

Key Features:

• Carbon semi-metallic 6-puck sprung hub disc offering leading performance in drivability, life, and torque capacity
• Double sprung hub with spring cover reliefs for flexibility and heat treated components for strength and durability
• Hub comes in either sprung or rigid configuration depending on application requirements
• Designed for street, drag race, pulling, and autocross use
• Aggressive engagement with streetable characteristics
• High torque capacity for modified engines

Important Installation Notes:

• This is a clutch disc only - designed for use with SPEC Stage 3 kit number SM663
• Flywheel must be resurfaced prior to installation to ensure proper friction surface integrity
• Requires minimum 450-mile break-in period with city/stop-and-go driving before aggressive use
• Follow manufacturer torque specifications and inspect all hardware before installation

SPEC Clutch is a leading manufacturer of high-performance street and racing clutches, with all products designed, hand-built, and tested in the USA. The Stage 3 disc represents an optimal balance between aggressive performance and street drivability for serious performance enthusiasts.