Spec Clutch SB111S Stage 1 Sprung Clutch Kit for BMW 325/525/528

The Spec Clutch SB111S is a Stage 1 single-disc performance clutch kit designed as a direct-fit upgrade for BMW 325, 525, and 528 models equipped with a manual transmission. Engineered for street-driven and lightly modified vehicles, this kit delivers improved holding power and durability over the factory clutch while maintaining a comfortable, daily-driver-friendly pedal feel.

Key Features:

• High-clamp pressure plate for increased torque capacity over the OEM unit
• Carbon Kevlar-based organic disc lining — integrally molded for smooth engagement and excellent service life
• Steel-backed disc for strength under high clamp loads and elevated temperatures
• Double-sprung hub with spring cover reliefs for drivetrain flexibility and vibration damping
• Heat-treated hub components for long-term strength and durability
• Includes clutch alignment tool for straightforward installation

The SPEC Stage 1 is the ideal first step in clutch performance for street-driven BMWs that see occasional spirited driving or light track use. Its organic friction compound provides progressive, predictable engagement — making it a seamless upgrade over a worn OEM clutch without the harsh on/off characteristics of race-oriented stages.