1-480-966-3040 Mon-Fri 8am to 5pm AZ
Performance & Aftermarket Car Parts - Vivid Racing Performance & Aftermarket Car Parts - Vivid Racing
Live Chat
Hello, Sign in My Account
Sign In
Wishlist
0
My Cart
My Cart $0.00
  See more parts for Mazda Mazda 3
Select the year of your Mazda Mazda 3:
ACT XACT Flywheel Prolite Mazda 3 | 6 2003-2013 - 600521
ACT XACT Flywheel Prolite Mazda 3 | 6 2003-2013 - 600521 - Image 3 ACT XACT Flywheel Prolite Mazda 3 | 6 2003-2013 - 600521 - Image 2 ACT XACT Flywheel Prolite Mazda 3 | 6 2003-2013 - 600521 - Image 3

ACT Prolite Flywheel - Part Number: 600521

The ACT Prolite Flywheel 600521 is a standout choice for performance enthusiasts looking to enhance their vehicle's responsiveness and acceleration. Designed with a focus on lightweight construction, this flywheel offers the lowest inertia available in ACT's lineup, making it a prime candidate for road racing and rally applications.

Crafted from high-quality chromoly steel, the 600521 flywheel is heat-treated to ensure strength and durability. Its one-piece construction minimizes the chances of failure, promoting efficient heat transfer from the clutch disc to maintain performance under pressure. Many customers have noted the noticeable improvement in throttle response, which can significantly elevate your driving experience.

Customer Feedback

One satisfied customer shared, "After installing the ACT 600521, I immediately felt the difference in acceleration. My car feels so much more alive!" Another user mentioned, "It's a bit noisy, but the performance gains are worth it. This flywheel really delivers on the track!"

Features:

  • Dramatically improved engine response and acceleration, with mild to moderate gear rattle.
  • Heat-treated forging for enhanced strength and toughness.
  • Induction-hardened ring gears for maximum longevity.
  • Recommended specifically for racing applications.
  • Forged, CNC machined, and dynamically balanced for high RPM reliability.

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: 15.7 lbs
  • Tooth Quantity: 112
  • Friction Surface Diameter: 9.4 in

Important Notes:

  • This flywheel must be used with an ACT pressure plate and disc (not included). Pressure plate bolts are included (M8-1.25 x 16mm).

Fitment:

This flywheel is confirmed to fit the following vehicles:

  • Mazda 3 (2004-2013)
  • Mazda 6 (2003-2008)

Installation Instructions:

For detailed installation instructions, please CLICK HERE.

Other Part Numbers:
ACT #act600521

Proposition 65

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

Vehicle
2004-2013
 Mazda Mazda 3
2003-2008
 Mazda Mazda 6

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.

Check out these other great products