Spec Clutch ST852-2 Stage 2 Performance Clutch Kit

The Spec Clutch ST852-2 Stage 2 Clutch Kit is a high-performance upgrade designed for street-driven vehicles that see occasional spirited or competitive use. Engineered for mild to moderately modified naturally aspirated and forced-induction engines, it delivers a meaningful step up in torque capacity and longevity compared to Stage 1, while preserving the smooth, stock-like pedal feel that makes it practical for daily driving.

At the heart of the Stage 2 kit is a segmented or full-face pure Kevlar® friction disc with a steel backing. This construction provides excellent drivability and engagement characteristics, improved wear resistance, and greater torque holding capacity over a standard OEM or Stage 1 clutch. The hub features a double-sprung design with spring cover reliefs for added flexibility, while heat-treated internal components ensure long-term strength and durability under demanding conditions.

Key Features:

• Segmented or full-face pure Kevlar® friction disc with steel backing
• High-clamp performance pressure plate for increased torque capacity
• Double-sprung hub with spring cover reliefs for smooth, flexible engagement
• Heat-treated hub components for enhanced strength and durability
• 9.500 in. (241 mm) disc diameter
• 21-spline input shaft, 1.125 in. diameter
• Includes release bearing and installation tool kit (select models)
• Flywheel not included

Intended Use: Street, Drag, Pulling, Autocross

The ST852-2 Stage 2 kit is the ideal choice for enthusiasts who want measurably more clutch performance than stock without sacrificing the daily drivability that makes a car livable on the street. It represents a step up in SPEC's progressive clutch lineup, sitting above the Stage 1 and below the more aggressive Stage 2+ for precise application matching.