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ACT HD/Perf Street Rigid Kit Audi A4 | A4 Quattro | Volkswagen Passat 1997-2005 - AA1-HDSD

ACT AA1-HDSD Heavy Duty Clutch Kit

Introducing the ACT AA1-HDSD Heavy Duty Clutch Kit, a top choice for those who demand both performance and reliability from their clutch system. Designed with the enthusiast in mind, this kit features ACT's renowned Heavy Duty pressure plate, which is engineered to enhance clamp load while minimizing deflection. This means a longer lifespan for your clutch and smoother operation on the road.

One of the standout features of the AA1-HDSD is its exclusive diaphragm design, which has undergone a rigorous four-stage heat-treating process. This not only improves performance but also ensures that the pressure plate maintains its integrity under high-stress conditions. Customers have noted how this design contributes to a more responsive feel during gear shifts, making driving more enjoyable.

The clutch disc included in this kit is made from premium organic materials with a high copper content, which significantly improves heat transfer. Its steel-backed lining enhances durability, making it a reliable choice for both daily driving and spirited weekend races. Plus, the chrome-moly hub is heat-treated for added strength, ensuring that you get the most out of your investment.

Customer Feedback

“I installed the AA1-HDSD in my Audi A4, and the difference was night and day. The pedal feel is just right, and the engagement is super smooth. I can definitely feel the extra clamp load during shifts!” – John D.

“This clutch kit is a game changer! I’ve noticed much quicker shifts, and it handles the power of my modified engine without any issues. Highly recommend!” – Sarah L.

Key Features:

  • Light to moderate pedal effort for ease of driving.
  • Increased gear rattle, providing a performance-oriented feel.
  • Longer friction life thanks to ACT's robust diaphragm design.
  • Engineered for both street and race applications.
  • 100% clamp load tested for reliability 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: Yes
  • Clutch Disc Diameter: 9 in (228 mm)
  • Disc Material: Organic
  • Input Spline Quantity: 23
  • Input Shaft Diameter: 0.9375 in
  • Alignment Tool Included: Yes
  • Disc Type Sprung Solid: Solid
  • Product Weight: 12 lbs
  • Torque Capacity: 280 ft/lbs

Important Notes:

  • This kit must be used with SACHS dual-mass flywheel #DMF91115.

Fitment:

The ACT AA1-HDSD is compatible with the following vehicles:

  • Audi A4 (1997-2005)
  • Audi A4 Quattro (1997-2005)
  • Volkswagen Passat (1997-2005)

Upgrade your driving experience with the ACT AA1-HDSD Heavy Duty Clutch Kit and enjoy the perfect blend of performance and durability!

Other Part Numbers:
ACT #actAA1-HDSD

Proposition 65

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

Vehicle
1997-2005
 Audi A4
1997-2005
 Audi A4 Quattro
1997-2005
 Volkswagen Passat

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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