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  See more parts for Chevrolet Bel Air
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ACT XACT Flywheel Prolite Chevrolet | GMC 1955-1985 - 600455
ACT XACT Flywheel Prolite Chevrolet | GMC 1955-1985 - 600455 - Image 3 ACT XACT Flywheel Prolite Chevrolet | GMC 1955-1985 - 600455 - Image 2 ACT XACT Flywheel Prolite Chevrolet | GMC 1955-1985 - 600455 - Image 3

If you're looking to amp up your ride's responsiveness without adding unnecessary weight, the ACT Prolite Flywheel 600455 is worth your attention. This flywheel is ACT's lightest option, designed specifically to help your engine rev quicker and deliver a more exhilarating acceleration experience. Whether you're hitting the track or just want your daily driver to feel a bit more lively, this flywheel is a solid pick.

Now, let’s get into the nitty-gritty. The Prolite flywheel is made from Chromoly Steel, which means it’s tough and can handle the heat. It features a heat-treated forging process that gives it strength and durability, so you won’t have to worry about it warping or failing on you. The one-piece construction is a game changer—no more dealing with loose ring gears or warped inserts. This design allows for efficient heat transfer, which is crucial when you're pushing your engine hard.

But here's the kicker: while it does improve throttle response significantly, it does come with a mild to moderate gear rattle. It’s a trade-off for that race-ready feel, but if you’re serious about performance, it’s a small price to pay. Plus, it’s been CNC machined and dynamically balanced for smooth operation at high RPMs, so you can really push your limits without worrying about reliability.

Specifications:

  • Weight: 12.2 lbs
  • Tooth Quantity: 153
  • Friction Surface Diameter: 10.5 in
  • SFI Rating: 1.1
  • Engine Balance: Internal
  • Friction Surface Configuration: Flat
  • Mounting Hole Quantity: 6
  • Replaceable Friction Surface: No

As for installation, you can check out detailed instructions here. Just a heads-up, it doesn’t come with mounting hardware, so make sure you have that sorted out before you dive in.

This flywheel fits a range of classic Chevy and GMC models, including:

  • Chevrolet Camaro (1967-1973, 1976-1985)
  • Chevrolet Corvette (1955-1969, 1980)
  • Chevrolet C/K Series (1961-1985)
  • GMC C/K Series (1961-1985)
  • And many more!

So, if you’re ready to take your driving experience to the next level, the ACT Prolite Flywheel 600455 is a solid investment. It’s built for those who crave performance and aren’t afraid to feel a little rawness in their ride. Get ready to feel the difference!

Other Part Numbers:
ACT #act600455

Proposition 65

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

Vehicle
1955-1969, 1971-1974
 Chevrolet Bel Air
1958-1969, 1971-1972
 Chevrolet Biscayne
1969-1973
 Chevrolet Blazer
1958-1961, 1972
 Chevrolet Brookwood
1961-1973, 1977-1985
 Chevrolet C/K 10
1961-1973, 1977-1979, 1981-1985
 Chevrolet C/K 20
1961-1973, 1978, 1982-1985
 Chevrolet C/K 30
1967-1973, 1976-1985
 Chevrolet Camaro
1966-1969, 1971-1972, 1977-1985
 Chevrolet Caprice
1964-1973
 Chevrolet Chevelle
1962-1968
 Chevrolet Chevy II
1955-1969, 1980
 Chevrolet Corvette
1958
 Chevrolet Del Ray
1959-1960, 1964-1973, 1976-1985
 Chevrolet El Camino
1977-1985
 Chevrolet G10
1969-1973
 Chevrolet G10 Van
1980-1985
 Chevrolet G20
1969-1970
 Chevrolet G20 Van
1978-1979, 1982-1985
 Chevrolet G30
1959-1969, 1971-1972, 1977-1985
 Chevrolet Impala
1977-1985
 Chevrolet K5 Blazer
1971-1972
 Chevrolet Kingswood
1976
 Chevrolet Laguna
1964-1967, 1973, 1976-1983
 Chevrolet Malibu
1970-1972, 1976-1985
 Chevrolet Monte Carlo
1975-1979
 Chevrolet Monza
1969-1973, 1975-1979
 Chevrolet Nova
1955-1957
 Chevrolet One-Fifty Series
1979
 Chevrolet P10
1973
 Chevrolet P10 Van
1982-1985
 Chevrolet P20
1966-1967
 Chevrolet P20 Series
1968-1969, 1973
 Chevrolet P20 Van
1982-1985
 Chevrolet P30
1964-1967
 Chevrolet P30 Series
1968-1969, 1972-1973
 Chevrolet P30 Van
1961-1966
 Chevrolet Suburban
1972
 Chevrolet Townsman
1955-1957
 Chevrolet Two-Ten Series
1961-1965
 GMC 1000 Series
1961-1965
 GMC 1500 Series
1961-1965
 GMC 2500 Series
1967-1978
 GMC C/K 15
1979-1985
 GMC C/K 1500
1967-1978
 GMC C/K 25
1979-1985
 GMC C/K 2500
1973-1978
 GMC C/K 35
1979-1985
 GMC C/K 3500
1978-1985
 GMC Caballero
1979-1985
 GMC G1500
1979-1985
 GMC G2500
1982-1985
 GMC G3500
1970-1985
 GMC Jimmy
1981-1985
 GMC P2500
1981-1985
 GMC P3500
1971-1976
 GMC Sprint

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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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