HD/Modified Street

This is a Heavy Duty Performance Street Modified Clutch Kit from Advanced Clutch. While the exact 'MM' variant details are not explicitly found, information for the 'SS' (Street Sprung) variant (MB4-HDSS) indicates it features ACT's most popular Heavy Duty pressure plate and street disc. ACT Heavy Duty pressure plates are designed with exclusive diaphragm technology to increase clamp load, reduce deflection, and maximize clutch life, undergoing a four-stage heat-treating process for unparalleled performance. The pressure plates have precision cover stampings for rigidity and consistency. Performance Street discs (like the 'SS' variant) feature premium organic materials with high copper content for better heat transfer and steel-backed lining for greater burst strength and durability. These discs have reduced marcel for faster shift action and are designed to complement ACT pressure plates with increased strength and reliability. Recommended for street and race use. 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability. Expect a light to moderate pedal effort, smooth positive engagement, and OE to mild gear rattle.