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HC9-HDR4 kit features ACT's most popular Heavy Duty pressure plate
MB4-HDR6 kit features ACT's most popular Heavy Duty pressure plate
The combination will make more power than any shorty header and high-flow cat combo
Coating:Stainless Steel
** These cats get welded into your existing exhaust after the headers
Advanced Clutch HD/Race Rigid 4 Pad Kit (HC9-HDR4) PPE_CeramicCoating_4 HC9-HDR4 kit features ACT's mostHC9 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