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  See more parts for Honda S2000
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ACT HD/Race Rigid 4 Pad Kit Honda S2000 2000-2009 - HS1-HDR4

If you're looking to up your game with your Honda S2000, the ACT HD/Race Rigid 4 Pad Kit HS1-HDR4 is definitely worth considering. This kit features ACT's go-to Heavy Duty pressure plate, which is known for its solid performance. The unique diaphragm design really cranks up the clamp load while keeping deflection in check, which means your clutch is going to last longer and work harder. Plus, every diaphragm goes through a four-stage heat-treating process, so you know it's built to handle some serious heat.

What I really appreciate about ACT pressure plates is the precision cover stampings. They give the plate a level of rigidity and consistency that you can feel when you're driving. Now, let’s talk about the 4-pad rigid race discs. These bad boys are crafted from high-quality ceramic friction materials. The chrome-moly hub is heat-treated, making it tough enough to take whatever you throw at it. The lightweight design means quicker shifts, which is a game changer on the track or even just in spirited driving.

Sure, the engagement is a bit harsher with the 4-pad setup, but if you’re after speed, that’s a trade-off you’ll appreciate. This kit is particularly suited for smaller engine setups, so if you've got a smaller disc size, you’re in luck.

Installation is straightforward:

Here’s what you can expect:

  • Light to moderate pedal effort with aggressive engagement and a bit of gear rattle.
  • The friction life is moderate, but thanks to ACT's diaphragm design, it’s extended, though keep in mind the rigid setup may increase spline wear.
  • These components are engineered with precision and balanced for smooth high RPM operation, making them ideal for race use.
  • Every part is 100% clamp load tested, so you can trust it will hold up when you need it most.

Specifications at a glance:

  • Clutch Master Cylinder: Not included
  • Grease: Included
  • Grade Type: Performance
  • Flywheel: Not included
  • Pilot Bushing: Not included
  • Pressure Plate Type: Heavy Duty
  • Release Bearing: Not included
  • Clutch Disc Diameter: 8.3 in (212 mm)
  • Disc Material: Ceramic
  • Input Spline Quantity: 24
  • Input Shaft Diameter: 1.03125 in
  • Alignment Tool: Included
  • Disc Type: Solid
  • Pressure Plate Bolts: Not included
  • Clutch Slave Cylinder: Not included
  • Flywheel Bolts: Not included
  • Pilot Bearing: Not included
  • Product Weight: 11.9 lbs
  • Torque Capacity: 475 ft/lbs (0.78 over OE)

Just a heads up: This kit doesn’t come with bearings, so you'll need to grab those separately.

Overall, if you're serious about performance and want to make the most of your S2000, the ACT HD/Race Rigid 4 Pad Kit is a solid choice. It’s built for the track but offers that daily driving reliability you need.

Other Part Numbers:
ACT #actHS1-HDR4

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
2000-2009
 Honda S2000

ACT Banner

ACT ? Advanced Clutch Technology | Clutch Kits & Flywheels Built to Handle Real Power

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.
  • Hold More Power Engineered to handle turbo, supercharger, and high-compression builds
  • Faster Engagement Stronger pressure plates for better bite off the line
  • Better Pedal Feel Balanced response without going full race-car stiff
  • Reduced Rotational Mass Lightweight flywheels improve rev-matching and response
  • No Guesswork Direct-fit applications, no fabbing, no hassle
ACT Clutch Kits and Flywheels Fit the Cars Enthusiasts Build

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:
  • Performance Clutch Kits From HD street kits to twin-disc race systems
  • Clutch Discs 6-puck, full-face, rigid or sprung to match your style
  • Pressure Plates Heavy-duty options that increase clamp load without sacrificing control
  • Chromoly Lightweight Flywheels Quicker revs, smoother shifts, and less drivetrain stress
  • Complete Hardware Kits Everything you need for a proper install
Performance Tested. Driver Approved.

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.

ACT warrants all products to be free of defects in materials and workmanship for normal use and service for a period of one (1) year from retail purchase. Written notice must be immediately given to ACT within the warranty period. We require a copy of the purchase receipt showing the unit was purchased from an Authorized Dealer or Advanced Clutch Technology directly to verify the product is under warranty. Products purchased used do not carry a warranty. This warranty is to the original purchaser and is non-transferable. All non-warranty items are subject to a $50 inspection bench test fee.

ACT reserves the right to examine any part returned for warranty claim to determine, to ACT's satisfaction, whether the material or workmanship of the part does not conform to this limited warranty. ACT's obligation under this warranty shall be limited to repairing, replacing, or crediting, at its option, any part which is deemed covered by ACT. No labor, lift or storage charges will be reimbursed for any reason. Damage to ACT's parts resulting from misuse, improper use, or abuse shall void this limited warranty. Failure to follow ACT's installation instructions and the vehicle manufacturers installation procedures and specifications shall void this limited warranty.

ACT undertakes no responsibility for the quality of the goods except as otherwise provided in this contract. ACT assumes no responsibility that the goods will be fit for any particular purpose for which you may be buying these goods, except as otherwise provided in the contract. ACT shall not be liable for any damage or injury to persons or property resulting from improper installation or misuse of any part subject to this warranty.

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