Spec Clutch SZ353F Stage 3 Plus Carbon Semi-Metallic Clutch Kit

The Spec Clutch SZ353F Stage 3 Plus is the flagship performance clutch kit for high-powered street and competition vehicles that demand strong torque capacity without sacrificing drivability. Built around a carbon semi-metallic full-faced friction disc, the Stage 3+ delivers an exceptional balance of long service life, high friction coefficient, and smooth, manageable engagement — all in a single performance package.

The clutch disc hub is double-sprung with spring cover reliefs, providing added flexibility to absorb drivetrain shock, while heat-treated internal components ensure long-term strength and durability under sustained high-load conditions. The kit pairs this advanced disc assembly with a high-clamp pressure plate for maximum clamping force and positive engagement.

Key Features:

• Carbon semi-metallic full-faced friction material — superior life, friction coefficient, and drivability
• High-clamp pressure plate — increased clamping force for high-torque applications
• Double-sprung hub with spring cover reliefs — absorbs shock, adds flexibility
• Heat-treated hub components — enhanced strength and long-term durability
• Complete kit — includes bearing and installation tool kit
• Designed, hand-built, and tested in the U.S.A.

Ideal Driving Applications: Street performance, drag racing, autocross, road racing, rally, pulling, and drifting.

The SPEC Stage 3+ is the highest street-oriented stage in the SPEC lineup before moving into dedicated race-only configurations, making it the ideal choice for performance enthusiasts who need serious holding power with daily-drivable engagement characteristics. All SPEC clutch kits and flywheels are SFI Approved.