Alright, gearheads, let’s talk about the ACT NS4-HDR6 HD/Race Rigid 6 Pad Kit. If you’re serious about your clutch setup, this is the kind of kit that’s going to make your heart race. We’re talking about ACT’s Heavy Duty pressure plate here, which is a fan favorite for good reason. It’s got this unique diaphragm design that cranks up the clamp load, cuts down on deflection, and helps your clutch last longer. Seriously, these diaphragms go through a four-stage heat-treating process, so you know they’re built to take a beating.
Now, let’s get into the nitty-gritty. The pressure plates are engineered with precision cover stampings, giving you that extra rigidity and consistency you need when you’re pushing your ride to the limit. And those 6-pad rigid race discs? They’re made from top-notch ceramic friction materials. The chrome-moly hub is heat-treated too, meaning it’s tough as nails. This lightweight, rigid design means you can shift quicker without any hiccups.
Just a heads up, though: the engagement is a bit harsher with this setup, but you’ll notice shifts happening faster than ever. This kit is really geared towards those who want to absorb more heat, especially if you’re running larger clutch sizes. It’s definitely race-focused, so if you’re hitting the track, this is what you want.
Installation Notes:
What You Get:
Specifications:
So, if you’re ready to step up your game and feel the difference in your ride, the ACT NS4-HDR6 kit is your ticket to a more responsive and powerful clutch experience.
Other Part Numbers:
ACT #actNS4-HDR6
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
1989-1998 Nissan 180SX |
180SX | 1989-1998 |

If you've added boost, tuned for more power, or simply want better throttle control, then your stock clutch won't cut it. That?s where ACT (Advanced Clutch Technology) comes in delivering high-performance clutch kits and flywheels designed for real drivers who push their builds on the street, strip, or track.
ACT?s lineup includes everything from daily driver friendly HD kits to hardcore twin disc setups for serious horsepower. Whether you?re launching hard in a WRX, drifting in a 370Z, or canyon carving in an M3, ACT gives you the torque capacity and engagement you need without sacrificing drivability.
Why ACT? Because Power Without Control Is Useless.ACT doesn?t just make universal performance parts ? they build complete, vehicle-specific clutch solutions for enthusiast favorites. Whether you daily a Civic Type R, track a Subaru STI, drift a 240SX, or drag a Mustang GT, ACT offers the right clutch to match your build goals.
Top supported platforms include the Nissan 350Z/370Z, Toyota Supra A90, Chevy Camaro SS/ZL1, Mitsubishi Evo, Ford Focus RS/ST, and BMW M3/M4 ? each with clutch options tuned to your driving needs.
What ACT Offers:ACT isn?t hype ? it?s proven. Their clutches are SFI-certified, track-tested, and used by racers in drag, time attack, autocross, drift, and rally. But what really matters? They hold power, last longer, and feel right even after hundreds of hard launches or hours of canyon carving.
Whether you're upgrading for more power or replacing a tired OEM clutch, ACT gives you the bite, strength, and feel to drive harder with confidence. No compromises, no excuses just parts that work when it matters.