Spec Clutch SU304 Stage 4 Clutch Kit

The SPEC SU304 Stage 4 Clutch Kit is engineered for heavily modified, high-output engines where maximum torque capacity, instantaneous engagement, and reduced rotating mass are critical. This is a competition-grade clutch system not intended for street use due to its aggressive, unforgiving engagement characteristics.

At the heart of the Stage 4 system is a high-clamp pressure plate paired with a 3, 4, or 6-puck carbon semi-metallic friction disc mounted on a high-torque rigid hub and carrier assembly. The reduced friction surface contact of the puck-style disc delivers lightning-fast engagement and exceptional heat resistance under repeated high-load cycles. The complete kit includes the pressure plate, clutch disc, release bearing, and installation tool kit — everything needed for a full clutch system replacement.

Key Features:

• High-clamp pressure plate for maximum clamping force and torque capacity
• Carbon semi-metallic 3, 4, or 6-puck friction disc for rapid, positive engagement
• Rigid hub and carrier assembly built for high-torque applications
• Reduced rotating mass improves throttle response and rev speed
• Includes release bearing and installation tool kit
• Designed for competition use — not recommended for street driving

Ideal Driving Applications: Drag Racing, Drifting, Road Racing, Rallying, Pulling, Circle Track

The SPEC Stage 4 clutch system is built for drivers who demand the absolute limit of clutch performance in a race or competition environment. When precise, instantaneous power transfer is non-negotiable, the SU304 delivers.