ACT HD/Race Rigid 4 Pad Kit BMW 318 | 323 | 325 | 328 | 330 | 525 | 528 | 530 | M3 | Z3 1991-2003

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Model#BM12-HDR4
ManufacturerACT

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ACT BM12-HDR4 Heavy Duty Clutch Kit

Upgrade your driving experience with the ACT BM12-HDR4 Heavy Duty Clutch Kit, designed for those who demand performance without compromise. This kit features ACT's renowned Heavy Duty pressure plate, which utilizes a unique diaphragm design to boost clamp load, minimize deflection, and extend the life of your clutch. Each diaphragm undergoes a meticulous four-stage heat-treating process, ensuring outstanding performance and durability.

Customer Feedback

"I installed the ACT BM12-HDR4 in my BMW, and the difference is night and day. Shifting is much quicker, and the engagement feels solid. Just be prepared for a more aggressive engagement!" - Mark T.

Features & Benefits

Light to moderate pedal effort with aggressive engagement for a thrilling driving experience.
Increased gear rattle, which is common in performance setups, adds character to your ride.
Moderate friction life, enhanced by ACT's exclusive diaphragm design that may increase spline wear.
Precision-engineered using select ceramic friction materials, providing high heat tolerance and maximum performance.
Ideal for race applications, ensuring you get the most out of your vehicle.
Every unit is 100% clamp load tested and dynamically computer balanced for reliable high RPM performance.

Specifications

Clutch Master Cylinder Included: No
Grease Included: Yes
Grade Type: Performance
Flywheel Included: Yes
Pilot Bushing Included: No
Pressure Plate Type: Heavy Duty
Release Bearing Included: Yes
Clutch Disc Diameter: 9.4 in (240 mm)
Disc Material: Ceramic
Input Spline Quantity: 10
Input Shaft Diameter: 1.125 in
Alignment Tool Included: Yes
Disc Type: Solid
Pressure Plate Bolts Included: Yes
Clutch Slave Cylinder Included: No
Flywheel Bolts Included: Yes
Pilot Bearing Included: Yes
Flywheel Type: Streetlite
Product Weight: 28.5 lbs
Torque Capacity: 596 ft/lbs

Installation Notes

This is a conversion kit that includes the ACT Streetlite flywheel. It is essential to use the included ACT flywheel for optimal performance. All necessary bolts for the flywheel and pressure plate are included.

Fitment

This kit 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)

Other Part Numbers:
ACT #actBM12-HDR4

Proposition 65

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

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

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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.