Advanced Clutch HD/Race Rigid 4 Pad Kit (ZM8-HDR4) PPE_CeramicCoating_4 The header is made of

The header is made of 16 gauge mild steel with polished ceramic coating

MB1-XTG6 kit features an Xtreme pressure plate for the most demanding driver

FM4-HDG6 kit features ACT's most popular Heavy Duty pressure plate

FM8-SPG6 kit features a Sport pressure plate for a nice upgrade

Longer clutch life achieved through ACT's exclusive diaphragm design

Advanced Clutch HD/Race Rigid 4 Pad Kit (ZM8-HDR4) PPE_CeramicCoating_4 The header is made ofZM8 HDR4 kit features ACT's most popular Heavy Duty pressure plate. ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four stage, heat treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's 4 pad rigid race discs are made with high quality, ceramic friction