ACT ZM2-HDSS Heavy Duty Street Sprung Clutch Kit for 1990-2005 Mazda Miata

Vehicle Fitment

• 1990-1993 Mazda Miata (Base/SE/LE, 1.6L I4 GAS FI, DOHC, Manual)
• 1994-1997 Mazda Miata (Base/M Edition, 1.8L I4 GAS FI, DOHC, Manual)
• 1999-2005 Mazda Miata (Base/LS/SE/Shinsen/Mazdaspeed/10th Anniversary, 1.8L I4 GAS FI, DOHC, Manual)

Features

• Heavy Duty diaphragm pressure plate for increased clamp load and extended life
• Performance-oriented street sprung clutch disc with premium organic friction material
• Steel-backed disc lining for enhanced burst strength and heat tolerance
• Reduced marcel design for quicker shift action and better drivability
• Light to moderate pedal effort with smooth positive engagement
• Quiet operation with OEM-to-mild gear rattle under normal driving
• Carefully assembled and dynamically balanced for high-RPM reliability
• Recommended for street driving and occasional track use

Specifications

• Clutch Disc Diameter: 8.8 in / 224 mm
• Disc Material: Organic friction with high-copper content
• Disc Type: Sprung street performance
• Pressure Plate Type: Heavy Duty diaphragm
• Input Shaft Diameter: 0.9375 in (15/16 in)
• Spline Count: 22
• Approx. Torque Capacity: ~245 ft-lbs (~20-50% over OEM)
• Product Weight: ~12.5 lbs
• Flywheel Included: No - requires compatible flywheel

Included Components

• 1x Heavy Duty diaphragm pressure plate
• 1x Performance street sprung clutch disc
• 1x Clutch release bearing
• 1x Pilot bearing
• 1x Clutch alignment tool

Product Description

The ACT ZM2-HDSS Heavy Duty Street Sprung Clutch Kit is a direct-fit performance upgrade engineered for **Mazda Miata/MX-5** models from **1990 through 2005** with manual transmissions. Featuring ACT's Heavy Duty diaphragm pressure plate paired with a performance street sprung disc, this kit offers increased clamp load and torque holding over many OEM clutches, providing smooth and confident engagement for spirited street driving and occasional track use. The premium organic friction materials and steel-backed disc design enhance heat tolerance and burst strength, while the reduced marcel profile helps promote quicker shifts and improved drivability.

Weighing approximately 12.5 lbs and rated around **245 ft-lbs** of torque capacity, this clutch kit strikes a balance between performance and everyday usability. Light to moderate pedal effort and smooth engagement make it suitable for daily driving, while dynamic balancing and precise assembly support reliable performance at higher RPMs. The kit includes a release bearing, pilot bearing, and alignment tool for installation convenience, but does **not** include a flywheel - a compatible flywheel must be used to complete the clutch assembly. ACT's Heavy Duty sprung design helps extend friction life and reduce fade compared to many stock systems.