When it comes to upgrading your ride, the Advanced Clutch HD/Race Sprung 4 Pad Kit Z66-HDG4 is a solid choice that I’ve personally put to the test. This isn’t just any clutch kit; it’s built around ACT's renowned Heavy Duty pressure plate. What really stands out is the exclusive diaphragm design that cranks up the clamp load, minimizes deflection, and extends the life of the clutch. It's like they’ve thought of everything—each diaphragm goes through a rigorous four-stage heat-treating process, which means you’re getting performance that’s tough to beat.

The pressure plates are crafted with precision cover stampings, giving them the rigidity and consistency you want when you’re pushing your car to its limits. Now, let’s talk about the 4-pad spring-centered race disc. It’s designed to handle the harshest conditions while dampening torsional vibrations, making for a quieter ride. Sure, the engagement might feel a bit harsher, but that’s the trade-off for faster shifting, which is what we’re all after, right?

One of the coolest features is the spring retainers. They’ve got this wraparound design and thicker stampings that support the springs like a champ, reducing stress concentrations and boosting overall strength and reliability. This kit is particularly well-suited for smaller disc sizes in smaller engines, making it a great fit for those of us who like to keep things nimble.

Installation Instructions:

• For detailed instructions, CLICK HERE

Features:

• Light to moderate pedal effort, with an aggressive engagement that adds a bit of thrill
• Moderate friction life, thanks to ACT's clever diaphragm design that extends durability
• Engineered with precision and accuracy, using select ceramic friction materials that handle high heat like a pro
• Perfectly suited for high horsepower street or race applications
• Every unit is 100% clamp load tested and dynamically balanced, ensuring smooth operation at high RPMs

Specifications:

• Clutch Master Cylinder Included: No
• Grease Included: Yes
• Grade Type: Performance
• Pilot Bushing Included: No
• Pressure Plate Type: Heavy Duty
• Release Bearing Included: Yes
• Clutch Disc Diameter: 8.8 in (224 mm)
• Disc Material: Ceramic
• Input Spline Quantity: 22
• Input Shaft Diameter: 0.9375 in
• Alignment Tool Included: Yes
• Disc Type: Sprung Solid
• Pressure Plate Bolts Included: No
• Clutch Slave Cylinder Included: No
• Flywheel Bolts Included: No
• Pilot Bearing Included: Yes
• Product Weight: 13.7 lbs
• Torque Capacity: 355 ft/lbs (0.87 over OE)

Products Fitment:

• Ford Probe 1992-1997
• Mazda 626 1993-2002
• Mazda MX-6 1993-1997
• Mazda Protege 2001-2003
• Mazda Protege5 2002-2003

If you’re serious about performance and want a clutch that can handle the heat, this kit is worth considering. It’s not just about the numbers; it’s about how it feels on the road. Trust me, you’ll notice the difference.