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  See more parts for Mazda Miata
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ACT XACT Flywheel Prolite Mazda Miata 1990-2005 - 600255
ACT XACT Flywheel Prolite Mazda Miata 1990-2005 - 600255 - Image 3 ACT XACT Flywheel Prolite Mazda Miata 1990-2005 - 600255 - Image 2 ACT XACT Flywheel Prolite Mazda Miata 1990-2005 - 600255 - Image 3

If you're looking to take your Mazda Miata's performance to the next level, the Advanced Clutch XACT Flywheel Prolite 600255 is a solid choice. This isn't just any flywheel; it's ACT's lightweight option, designed specifically for those who crave quick throttle response and improved acceleration. Trust me, once you experience the difference, you won’t want to go back.

The Prolite flywheel is a favorite among road and rally racers, and for good reason. It’s engineered to reduce inertia, which means your engine can rev up faster and respond more keenly to your inputs. Sure, it might come with a bit of mild to moderate gear rattle, but that’s just part of the charm when you’re pushing your ride to its limits.

What’s impressive is how ACT has crafted this flywheel. They’ve used heat-treated chromoly steel, which gives it the strength and toughness to withstand the rigors of racing. The one-piece construction is a game changer; it minimizes the chances of failure and ensures efficient heat transfer from the clutch disc. No more worrying about warped inserts or loose ring gears—this thing is built to last.

For those who like to dig into the specs, here’s what you need to know: it weighs in at just 9.4 pounds and features a friction surface diameter of 8.8 inches. The internal engine balance and recessed friction surface configuration are designed to keep things running smoothly, even at high RPMs. Plus, it’s dynamically computer balanced, which is a big plus for reliability when you’re really pushing the envelope.

And if you ever need to resurface it, that’s a breeze too—no extra parts needed. Just grab your tools and get to work. Keep in mind, though, that this flywheel is recommended for race use, so if you’re a weekend warrior or serious about your track days, it’s definitely worth considering.

Install Instructions:

Specifications:

  • Material: Chromoly Steel
  • SFI Rating: 1.1
  • Replaceable Friction Surface: No
  • Engine Balance: Internal
  • Friction Surface Configuration: Recessed
  • Type: Prolite
  • Mounting Hardware Included: No
  • Grade Type: Performance
  • Mounting Hole Quantity: 6
  • Weight: 9.4 LB
  • Tooth Quantity: 112
  • Friction Surface Diameter: 8.8 in
  • Product Weight (lbs.): 9.4
  • SFI: 1.1

This flywheel fits the Mazda Miata models from 1990-1997 and 1999-2005, so if you’re in the market for something that can really enhance your driving experience, the Prolite 600255 is worth a look.

Other Part Numbers:
ACT #act600255

Proposition 65

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

Vehicle
1990-1997, 1999-2005
 Mazda Miata

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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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