ACT Heavy Duty Performance Street Sprung Clutch Kit

Part #: ZM4-HDSS

Overview

The ACT Heavy Duty Performance Street Sprung Clutch Kit is designed to enhance the durability and performance of your Mazda MX-5 Miata (2006-2015). This comprehensive kit combines ACT’s most popular heavy-duty pressure plate with a high-quality street disc, providing a reliable upgrade for spirited driving, daily commuting, or track use. Crafted for enthusiasts seeking improved clamp load and longevity, this clutch kit helps ensure smooth engagement, consistent power transfer, and extended service life, making it an ideal choice for drivers who demand both performance and dependability from their vehicle’s clutch system. Whether you’re upgrading for increased driving confidence or replacing a worn clutch, this kit offers a balanced blend of street-friendly operation and robust construction. It supports your vehicle’s drivetrain by providing a firm pedal feel, reliable engagement, and enhanced heat resistance, helping to maintain optimal performance under demanding conditions.

Key Features

This clutch kit features advanced materials and innovative design elements to deliver consistent performance and durability:

• Heavy-duty diaphragm pressure plate with exclusive design for increased clamp load
• Precision cover stampings for improved rigidity and uniform pressure
• Heat-treated diaphragms for enhanced heat resistance and longevity
• High-quality organic performance street disc for smooth engagement and reliable power transfer
• Designed to support spirited driving and daily use
• Optimized for durability and consistent pedal feel

Construction & Design

The ACT HD/Perf Street Sprung Kit features a heavy-duty pressure plate with a precision-machined diaphragm and a high-performance organic disc. The components are engineered to withstand increased stress and heat, ensuring long-lasting performance. The pressure plate’s exclusive diaphragm design provides a higher clamp load while maintaining smooth operation, and the heat-treating process enhances durability under demanding conditions.

Driving Feel & Feedback

This clutch kit offers a firm pedal feel with smooth engagement, providing confident feedback during spirited driving or daily commuting. The organic disc ensures a progressive engagement, reducing shock and chatter, and supporting a comfortable driving experience.

Installation & Fitment

Installation should be performed by a qualified technician familiar with clutch replacement procedures. Proper alignment and torque specifications are critical for optimal performance and longevity. Fitment details should be verified against your vehicle’s specifications and the part number provided.

What’s Included

The kit includes the heavy-duty pressure plate, performance street disc, release bearing, and necessary hardware for installation, providing everything needed for a complete upgrade.