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  See more parts for BMW 318i
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ACT HD/Race Sprung 4 Pad Kit BMW 318 | 323 | 325 | 328 | 330 | 525 | 528 | 530 | M3 | Z3 1991-2003 - BM12-HDG4

ACT BM12-HDG4 Heavy Duty/Race Sprung 4 Pad Kit

The ACT BM12-HDG4 kit is engineered for performance enthusiasts who demand more from their clutch systems. Featuring ACT's renowned Heavy Duty pressure plate, this kit is designed to enhance your vehicle's performance while ensuring durability. The exclusive diaphragm design increases clamp load, minimizes deflection, and extends the life of your clutch, making it a reliable choice for both street and race applications.

Customer Feedback

Many users have praised the BM12-HDG4 for its impressive performance. One customer noted, "The engagement is aggressive but smooth, and I noticed a significant difference in my shifting speed. It's perfect for my track days!" Another user mentioned, "I installed it on my BMW, and it holds power like a champ. Highly recommended!"

Features & Benefits

  • Light to moderate pedal effort for comfortable driving.
  • Aggressive engagement with a touch of OE to mild gear rattle.
  • Moderate friction life, enhanced by ACT's unique diaphragm design.
  • Precision-engineered components ensure high performance and reliability.
  • Ideal for high horsepower street or race use, making it versatile for various driving styles.

Technical Specifications

  • Clutch Disc Diameter: 9.4 in (240 mm)
  • Torque Capacity: 596 ft/lbs
  • Input Spline Quantity: 10
  • Input Shaft Diameter: 1.125 in
  • Disc Material: Ceramic for high heat tolerance
  • Product Weight: 30 lbs
  • Pressure Plate Type: Heavy Duty

Installation Notes

For detailed installation instructions, CLICK HERE.

Fitment

The BM12-HDG4 is compatible with the following BMW models:

  • BMW 318i (1996-1999)
  • BMW 318is (1996-1999)
  • BMW 318ti (1996-1999)
  • BMW 323Ci (2000)
  • BMW 323i (1998-2000)
  • BMW 323is (1998-1999)
  • BMW 325Ci (2001-2003)
  • BMW 325i (1992 & 2001-2003)
  • BMW 325is (1992)
  • BMW 325xi (2001-2003)
  • BMW 328Ci (2000)
  • BMW 328i (1996-2000)
  • BMW 328is (1996-1999)
  • BMW 330Ci (2001-2003)
  • BMW 330i (2001-2003)
  • BMW 330xi (2001-2003)
  • BMW 525i (1991-1995 & 2001-2003)
  • BMW 528i (1997-2000)
  • BMW 530i (2001-2003)
  • BMW M3 (1996-1999)
  • BMW Z3 (1996-2002)
  • BMW Z3 M (1998-2002)

Important Notes

This is a conversion kit that includes the ACT Streetlite flywheel. Please ensure to use the included ACT flywheel for optimal performance. Flywheel bolts (M12-1.5 x 30mm) and pressure plate bolts (M8-1.25 x 20mm) are included in the kit.

Other Part Numbers:
ACT #actBM12-HDG4

Proposition 65

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

Vehicle
1996-1999
 BMW 318i
1996-1999
 BMW 318is
1996-1999
 BMW 318ti
2000
 BMW 323Ci
1998-2000
 BMW 323i
1998-1999
 BMW 323is
2001-2003
 BMW 325Ci
1992, 2001-2003
 BMW 325i
1992
 BMW 325is
2001-2003
 BMW 325xi
2000
 BMW 328Ci
1996-2000
 BMW 328i
1996-1999
 BMW 328is
2001-2003
 BMW 330Ci
2001-2003
 BMW 330i
2001-2003
 BMW 330xi
1991-1995, 2001-2003
 BMW 525i
1997-2000
 BMW 528i
2001-2003
 BMW 530i
1996-1999
 BMW M3
1996-2002
 BMW Z3
1998-2002
 BMW Z3 M

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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