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ACT HD/Race Sprung 4 Pad Kit Honda Civic 2006-2015 - HC9-HDG4

If you're looking to take your Honda Civic's performance up a notch, the ACT Heavy Duty/Race Sprung 4 Pad Kit (HC9-HDG4) is definitely worth considering. I've been using this kit for a while now, and I can tell you, it’s a game changer. The pressure plate is ACT's most popular heavy-duty option, and for good reason. Its unique diaphragm design ramps up the clamp load, cuts down on deflection, and really extends the life of your clutch. Plus, they put their diaphragms through a four-stage heat-treating process, which means you’re getting top-notch performance that holds up under pressure.The 4-pad spring-centered race disc is where things get interesting. It’s designed to dampen torsional vibrations, so you get a quieter ride, even when you’re pushing it hard. This kit is built for those who want aggressive engagement and faster shifts—just know that it’s a bit harsher on the engagement side. But if you’re like me and appreciate that snappy shift feel, you won’t mind. The disc is perfect for smaller engines, and it really shines when paired with high horsepower setups.One thing I appreciate is how solidly constructed everything feels. The pressure plates have precise cover stampings that add rigidity and consistency, and the spring retainers are designed to handle the stress of high performance, which means you can trust it won’t let you down when you need it most. Now, let’s talk numbers. This kit can handle a torque capacity of 305 ft/lbs, which is a significant upgrade over stock. That’s not just talk; it’s been 100% clamp load tested and dynamically balanced for smooth operation at high RPMs. Just a heads up, this kit doesn’t come with a clutch master cylinder or alignment tool, so you’ll need to grab those separately. But it does include some grease and a release bearing, so you’re not completely left in the lurch.If you’re serious about getting the most out of your Civic, this ACT kit is a solid investment. It’s designed for both street and race use, so whether you’re hitting the track or just enjoying a spirited drive on the weekends, you can count on it to deliver. Install Instructions:

Features:
  • Light to moderate pedal effort, aggressive engagement, with some OE to mild gear rattle
  • Moderate friction life, thanks to ACT's exclusive diaphragm design
  • Engineered for performance, using select ceramic friction materials that can handle high heat
  • Recommended for high horsepower street or race applications
  • 100% clamp load tested and dynamically balanced for reliable high RPM performance
Specifications:
  • Clutch Master Cylinder Included: No
  • Grease Included: Yes
  • Grade Type: Performance
  • Flywheel Included: No
  • Pilot Bushing Included: No
  • Pressure Plate Type: Heavy Duty
  • Release Bearing Included: Yes
  • Clutch Disc Diameter: 8.4 in (214 mm)
  • Disc Material: Ceramic
  • Input Spline Quantity: 20
  • Input Shaft Diameter: 0.875 in
  • Alignment Tool Included: No
  • Disc Type: Sprung Solid
  • Pressure Plate Bolts Included: No
  • Clutch Slave Cylinder Included: No
  • Flywheel Bolts Included: No
  • Pilot Bearing Included: No
  • Product Weight: 10.5 lbs
  • Torque Capacity: 305 ft/lbs
  • Torque Capacity Over OE: 0.71

Compatibility: This kit fits Honda Civic models from 2006 to 2015.

Other Part Numbers:
ACT #actHC9-HDG4

Proposition 65

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

Vehicle
2006-2015
 Honda Civic

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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