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SB10-HDR4 kit features ACT's most popular Heavy Duty pressure plate
NX9-HDG4 kit features ACT's most popular Heavy Duty pressure plate
The headers with no cats show a 38-46whp gain
FM3-SPSS kit features a Sport pressure plate for a nice upgrade
Advanced Clutch HD/Perf Street Sprung for 2016-2018 Mazda MX-5 Miata (ZM12-HDSS) PPE_CeramicCoating_1 SB10-HDR4 kit features ACT's mostZM12 HDSS kit features ACT's most popular Heavy Duty pressure plate and most popular street disc. 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 Performance Street discs feature premium