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ACT HD/Perf Street Sprung Kit Chevrolet | Pontiac 1997-2013 - GM9-HDSS

If you're looking to step up your clutch game, the ACT GM9-HDSS Heavy Duty/Performance Street Sprung Kit might just be what you need. This kit combines ACT's heavy-duty pressure plate with a performance street disc that’s been a favorite among enthusiasts for a while now. The pressure plate features a unique diaphragm design that cranks up the clamp load, minimizes deflection, and ultimately helps your clutch last longer. Seriously, these things are built to take a beating.

What I really appreciate about ACT is their attention to detail. Each diaphragm goes through a rigorous four-stage heat-treating process, which means you’re getting top-notch performance. Plus, the pressure plates have precision cover stampings that add some serious rigidity and consistency. You’ll notice a difference right away.

As for the performance street discs, they’re made from premium organic materials that boast a high copper content. This means better heat transfer during those spirited drives. The steel-backed lining gives it that extra burst strength and durability you want when you’re pushing your car. And let’s not forget, these discs are designed with reduced marcel, which translates to quicker shifts—perfect for when you’re in the heat of the moment.

Install Instructions:

Features:

  • Light to moderate pedal effort with smooth engagement—no more fighting the clutch.
  • Longer friction life thanks to that clever diaphragm design ACT has going on.
  • Engineered for precision and balance, using premium organic materials that handle heat like a champ.
  • Great for both street and race applications—versatility is key.
  • Each unit is clamp load tested and dynamically balanced, so you can trust it at high RPMs.

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: No
  • Clutch Disc Diameter: 11 in (280 mm)
  • Disc Material: Organic
  • Input Spline Quantity: 26
  • Input Shaft Diameter: 1.125 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: No
  • Product Weight: 29.8 lbs
  • Torque Capacity: 709 ft/lbs (that’s a solid bump over OE)

Notes:

  • Make sure you pair this with a flat flywheel or the ACT 600585 flywheel for LS2/LS3/LS7 setups.

Products Fitment:

  • Chevrolet Camaro 1998-2002
  • Chevrolet Corvette 1997-2013
  • Chevrolet Corvette Grand Sport 2010-2013
  • Chevrolet Corvette Z06 2001-2004
  • Chevrolet TrailBlazer 2006
  • Pontiac Firebird 1998-2002
  • Pontiac GTO 2004-2006

Other Part Numbers:
ACT #actGM9-HDSS

Proposition 65

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

Vehicle
1998-2002
 Chevrolet Camaro
1997-2013
 Chevrolet Corvette
2010-2013
 Chevrolet Corvette Grand Sport
2001-2004
 Chevrolet Corvette Z06
2006
 Chevrolet TrailBlazer
1998-2002
 Pontiac Firebird
2004-2006
 Pontiac GTO

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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