If you're looking to upgrade your clutch setup, the ACT NX9-HDG4 HD/Race Sprung 4 Pad Kit is a game changer. Having put this kit through its paces, I can tell you that it’s built for serious performance. The heart of this kit is ACT's Heavy Duty pressure plate, which employs a unique diaphragm design. This isn't just marketing fluff—this design ramps up the clamp load, minimizes deflection, and extends the life of your clutch. Trust me, you want that kind of reliability, especially if you’re pushing your ride to the limits.

One of the standout features is the four-stage heat-treating process that every diaphragm goes through. This means you're getting performance that can withstand some serious heat without giving up on you. Plus, the precision cover stampings add a level of rigidity that you can feel when you're driving. It’s not just about raw power; it’s about control and consistency.

Now, let’s talk about the 4-pad spring-centered race disc. This thing is designed to dampen torsional vibrations, which translates to a quieter ride. But don't let that fool you—engagement is definitely on the harsher side, which means you can expect faster shifts. If you’re running a smaller engine, this disc is particularly well-suited for you. It’s all about maximizing performance without sacrificing reliability.

Installation is straightforward, and if you need a hand, you can check out the installation instructions here.

What sets this kit apart?

• Light to moderate pedal effort with a pretty aggressive engagement—perfect for that spirited drive.
• Moderate friction life, but thanks to ACT's diaphragm design, you’ll get a bit more longevity.
• Engineered with select ceramic friction materials, this kit can handle high heat like a champ.
• Great for both high horsepower street setups and race applications.
• Every unit is 100% clamp load tested and dynamically balanced, ensuring smooth operation at high RPMs.

Specifications:

• Clutch Master Cylinder: Not included
• Grease: Included
• Grade Type: Performance
• Pilot Bushing: Included
• Pressure Plate Type: Heavy Duty
• Release Bearing: Included
• Clutch Disc Diameter: 8.4 in (214 mm)
• Disc Material: Ceramic
• Input Spline Quantity: 18
• Input Shaft Diameter: 0.8125 in
• Alignment Tool: Included
• Disc Type: Sprung Solid
• Pressure Plate Bolts: Not included
• Clutch Slave Cylinder: Not included
• Flywheel Bolts: Not included
• Weight: 10.8 lbs
• Torque Capacity: 310 ft/lbs (0.77 over OE)

Fits:

• Infiniti G20 (1991-1996 & 1999-2002)
• Nissan 200SX (1995-1998)
• Nissan NX (1991-1993)
• Nissan Sentra (1991-2006)

With the ACT HD/Race Sprung 4 Pad Kit, you’re not just getting a clutch; you’re getting a piece of equipment that’s ready for the challenge. Whether you’re hitting the streets or the track, this kit has your back.