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  See more parts for Saturn S-Series
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ACT HD/Perf Street Sprung Kit Saturn 1991-1999 - ST1-HDSS

ACT ST1-HDSS Heavy Duty Clutch Kit

The ACT ST1-HDSS Heavy Duty Clutch Kit is designed for those who demand a reliable and high-performance clutch solution. This kit combines ACT's most popular Heavy Duty pressure plate with a performance street disc, making it ideal for both daily driving and spirited weekend outings. Customers have praised its ability to deliver smooth engagement and solid performance without the harshness often associated with high-performance clutches.

Features and Benefits

  • Designed for light to moderate pedal effort, ensuring a comfortable driving experience.
  • Exclusive diaphragm design enhances clamp load and extends clutch life, providing long-lasting performance.
  • Constructed with premium organic materials featuring high copper content for excellent heat transfer.
  • Reduced marcel for quicker shift action, making gear changes more responsive.
  • 100% clamp load tested and dynamically balanced to ensure reliability at high RPMs.

Specifications

  • Clutch Disc Diameter: 8.4 in (214 mm)
  • Input Spline Quantity: 22
  • Input Shaft Diameter: 1 in
  • Torque Capacity: 250 ft/lbs.
  • Weight: 10.6 lbs.
  • Disc Type: Sprung
  • Grease Included: Yes
  • Release Bearing Included: Yes
  • Alignment Tool Included: Yes

Customer Feedback

Many users have reported that the ST1-HDSS kit provides a noticeable improvement in clutch feel compared to OEM options. One customer shared, "The engagement is smooth, and I can feel the difference in power transfer. It's perfect for my daily driver!" Another user noted, "I was surprised at how well it handled both street driving and a few track days without any issues." This clutch kit truly stands out for its blend of performance and reliability.

Installation Instructions

For detailed installation instructions, please CLICK HERE.

Fitment

This clutch kit is compatible with the following Saturn models:

  • Saturn S-Series (1991-1999)
  • Saturn SC (1991-1992)
  • Saturn SC1 (1993-1999)
  • Saturn SC2 (1993-1999)
  • Saturn SL (1991-1999)
  • Saturn SL1 (1991-1999)
  • Saturn SL2 (1991-1999)
  • Saturn SW1 (1993-1999)
  • Saturn SW2 (1993-1999)

Other Part Numbers:
ACT #actST1-HDSS

Proposition 65

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

Vehicle
1991-1999
 Saturn S-Series
1991-1992
 Saturn SC
1993-1999
 Saturn SC1
1993-1999
 Saturn SC2
1991-1999
 Saturn SL
1991-1999
 Saturn SL1
1991-1999
 Saturn SL2
1993-1999
 Saturn SW1
1993-1999
 Saturn SW2

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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