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  See more parts for Ford Mustang
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ACT XACT Flywheel Prolite Ford Mustang 1964-1998 - 600412
ACT XACT Flywheel Prolite Ford Mustang 1964-1998 - 600412 - Image 3 ACT XACT Flywheel Prolite Ford Mustang 1964-1998 - 600412 - Image 2 ACT XACT Flywheel Prolite Ford Mustang 1964-1998 - 600412 - Image 3

ACT Prolite Flywheel 600412

The ACT Prolite Flywheel 600412 is a standout choice for those looking to enhance their vehicle's performance. Designed specifically for racing enthusiasts, this flywheel offers a lightweight solution that significantly reduces inertia, leading to quicker throttle response and improved acceleration. It's ideal for road racing and rally applications where every millisecond counts.

Constructed from heat-treated Chromoly steel, the 600412 is built to endure the rigors of high-performance driving. The one-piece construction minimizes the risk of failure, ensuring uniform heat transfer from the clutch disc. This means no more worries about warped inserts or loose ring gears—just reliable performance when you need it most.

Customer Feedback

Many users have praised the 600412 for its noticeable impact on their vehicle's responsiveness. One customer noted, "I installed the ACT Prolite Flywheel on my Mustang, and the difference in acceleration is incredible! It feels like I’m driving a completely different car." However, some users have mentioned the mild to moderate gear rattle that comes with the improved performance, which is something to consider depending on your driving style.

Features & Benefits

  • Dramatically improves engine response and acceleration.
  • Heat-treated forging for enhanced strength and toughness.
  • Induction-hardened ring gears ensure maximum lifespan.
  • Recommended specifically for race use.
  • Forged, CNC machined, and dynamically balanced for smooth high RPM reliability.

Technical Specifications

  • Material: Chromoly Steel
  • SFI Rating: 1.1
  • Replaceable Friction Surface: No
  • Engine Balance: Internal
  • Friction Surface Configuration: Flat
  • Type: Prolite
  • Mounting Hardware Included: No
  • Grade Type: Performance
  • Mounting Hole Quantity: 6
  • Weight: 14.4 lbs
  • Tooth Quantity: 157
  • Friction Surface Diameter: 10.5 in

Installation Notes

  • Counterweight bolts included (5/16-18 x 1/2).

Fitment

This flywheel is compatible with the following models:

  • Ford Mustang 1964-1973 & 1979-1998
  • Ford Mustang GT 1982-1995
  • Ford Mustang II 1974-1978
  • Ford Mustang SVT Cobra 1993-1995

For installation instructions, CLICK HERE.

Other Part Numbers:
ACT #act600412

Proposition 65

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

Vehicle
1964-1973, 1979-1998
 Ford Mustang
1982-1995
 Ford Mustang GT
1974-1978
 Ford Mustang II
1993-1995
 Ford Mustang SVT Cobra

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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.

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