Spec Clutch SZ421 Stage Performance Clutch Kit - 1

The Spec SZ421 Stage 1 Clutch Kit is engineered for street-driven vehicles with naturally aspirated or mildly modified forced induction engines. Designed as a direct bolt-on replacement, it delivers stock-like daily drivability with significantly improved wear characteristics over OEM clutch components.

This complete kit features a high-clamp pressure plate paired with a steel-backed, multi-compound woven organic disc material. The organic friction material provides smooth engagement and excellent pedal feel, making it ideal for drivers who want a performance upgrade without sacrificing everyday comfort. The high-torque sprung hub and disc assembly helps absorb drivetrain shock and reduce chatter during normal operation.

Kit Includes:

• High-clamp performance pressure plate
• Steel-backed multi-compound woven organic clutch disc
• High-torque sprung hub and disc assembly
• Release bearing
• Installation tool kit

Suitable Driving Applications:

• Street driving
• Drag racing
• Drifting
• Road racing
• Rallye
• Pulling
• Autocross

The Spec Stage 1 is the ideal entry-level performance clutch upgrade for drivers seeking a reliable, long-lasting clutch that handles spirited driving demands while maintaining smooth, predictable engagement for daily use.