Spec Clutch SN425 Stage 5 Clutch Kit - Drag & Pulling Race

The SPEC SN425 Stage 5 Clutch Kit is an extreme-duty clutch system engineered for heavily modified drag race and pulling competition engines. It is also well-suited for applications requiring a slipper clutch or progressive torque-induced engagement characteristics. This is a race-only component — not intended for street use due to its aggressive, harsh engagement behavior.

Due to the highly specialized nature of this clutch kit, SPEC strongly recommends configuring it as a custom order. Buyers should contact a SPEC technical representative with specific details about their vehicle and intended application before ordering to ensure proper setup and optimal performance.

Kit Includes:

• High-clamping force pressure plate (adjustability available on select applications)
• Rigid iron disc assembly
• Throwout bearing
• Installation tool kit

Key Features:

• Extreme clamp load: Designed to handle the torque output of heavily modified and built race engines
• Rigid iron disc: Provides aggressive, positive engagement ideal for maximum power transfer in competition use
• Progressive engagement option: Suitable for slipper clutch and torque-ramp applications
• Custom configuration: Best ordered with application-specific details provided to a SPEC technician
• Race use only: Not street-friendly — intended exclusively for drag racing and pulling competitions

Recommended Driving Types: Drag Racing, Pulling Competition