{"product_id":"act-heavy-duty-race-rigid-4-pad-clutch-kit-2019-2025-mazda-mx-5-miata-zm15-hdr4","title":"ACT Heavy Duty Race Rigid 4-Pad Clutch Kit | 2019-2025 Mazda MX-5 Miata (ZM15-HDR4)","description":"\u003cdiv id=\"newdescr\"\u003e\n\u003cdiv id=\"newdescrRC\"\u003e\n\u003ch2\u003eHeavy Duty Race Clutch Kit w\/ 4-Pad Rigid Disc by ACT\u003c\/h2\u003e\n\u003cp align=\"justify\"\u003eZM15-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 materials. The chrome-moly hub is heat-treated for strength and durability. The lightweight, rigid design allows for quicker shifts and smooth, trouble-free service. With the 4-pad rigid race disc, engagement is harsher, but shifting is faster. The 4-pad rigid race disc is well-suited for the smaller disc sizes in smaller engines.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note: This Clutch Kit is Recommended for Race Use Only. Must be used with OE dual-mass flywheel or ACT flywheel (not included). Pressure plate bolts included (M8-1.25 x 20mm).\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque Capacity (ft\/lbs.): \u003c\/strong\u003e 399\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTorque Capacity Over OE: \u003c\/strong\u003e87%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisc Material: \u003c\/strong\u003eCeramic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClutch Disc Diameter (Inches): \u003c\/strong\u003e 8.8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClutch Disc Diameter (Millimeters): \u003c\/strong\u003e 224\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput Shaft Diameter (inches): \u003c\/strong\u003e0.9375\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Plate Type: \u003c\/strong\u003e Heavy Duty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBenefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeel: \u003c\/strong\u003e Light to moderate pedal effort, aggressive engagement, increased gear rattle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLife: \u003c\/strong\u003e Moderate friction life, extended by ACT's exclusive diaphragm design, rigid design may increase spline wear\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality: \u003c\/strong\u003e Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Use: \u003c\/strong\u003e Recommended for race use only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eACT Difference: \u003c\/strong\u003e 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv id=\"newdescrLC\"\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2019 - 2025 Mazda MX-5 Miata\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's in the box?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x MZ033 - ACT Heavy Duty Clutch Pressure Plate\u003c\/li\u003e\n\u003cli\u003e1 x 4224005-1 - ACT Performance Street Sprung Clutch Disc\u003c\/li\u003e\n\u003cli\u003e1 x AT05 - ACT Clutch Alignment Tool\u003c\/li\u003e\n\u003cli\u003e1 x RB110 - ACT Clutch Release Bearing\u003c\/li\u003e\n\u003cli\u003e1 x PB1030 - ACT Clutch Pilot Bearing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eACT warrants all products to be free of defects in materials and workmanship for normal use and service for a period of one (1) year from retail purchase\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"clear\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"ACT Clutch Kits \u0026 Flywheels","offers":[{"title":"Default Title","offer_id":50547925975110,"sku":"ZM15-HDR4-ACT","price":478.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0890\/6136\/files\/ZM15-HDR4.jpg?v=1790966818","url":"https:\/\/www.maperformance.com\/products\/act-heavy-duty-race-rigid-4-pad-clutch-kit-2019-2025-mazda-mx-5-miata-zm15-hdr4","provider":"MAPerformance","version":"1.0","type":"link"}