Upgrading your vehicle’s flywheel is one of the most effective ways to enhance engine response and overall driving dynamics. A lighter flywheel reduces rotational mass, allowing your engine to rev up and down more quickly, which translates to sharper acceleration and a more connected feel. Whether you’re building a performance machine or just want a more responsive daily driver, the right flywheel can make a significant difference.
This roundup focuses on high-quality options from ACT and other trusted manufacturers, known for their precision engineering and durability. We’ve compiled a list of top-tier flywheels to help you find the perfect match for your car and driving style. From ultra-lightweight race-oriented models to robust street performance units, there’s an option here to suit various needs and budgets.
Our Top ACT Flywheel Picks
- ACT 600110 Streetlite Xact Flywheel
- ACT 600585 XACT Prolite Flywheel
- ACT 600350 XACT Prolite Flywheel
- ACT SB11-HDSS Clutch Kit with Streetlite Flywheel
- ACT 600105 ProLite Xact Flywheel
- Fidanza Aluminum Flywheel for Toyota Supra Turbo
- ACT Flywheel For Hyundai Genesis Coupe | XACT Streetlite
- ACT Streetlite Flywheel for Honda Civic
- ACT Prolite Flywheel for Subaru WRX
ACT 600110 Streetlite Xact Flywheel
The ACT 600110 Streetlite Xact Flywheel is engineered to provide a noticeable improvement in engine responsiveness. By being considerably lighter than a stock flywheel, it reduces rotational mass, which helps your engine rev more freely. This results in quicker acceleration and a more engaging driving experience.
Constructed with high-quality materials, this flywheel is built for durability and consistent performance. It is an excellent upgrade for daily drivers and weekend performance enthusiasts alike who are looking for a reliable part that delivers on its promises without compromising street manners.
ACT 600585 XACT Prolite Flywheel
Engineered for the performance-minded driver, the ACT 600585 XACT Prolite Flywheel is designed to improve engine response and acceleration through its lightweight design. The reduction in rotational inertia allows the engine to change RPMs faster, giving you a more immediate connection to the powertrain.
ACT ensures long-term reliability by heat-treating the entire forging for enhanced strength and toughness. The one-piece construction is a key feature, eliminating the risk of warped inserts or loose ring gears that can plague lesser units. This design also promotes uniform and efficient heat transfer away from the clutch disc, contributing to consistent performance.
ACT 600350 XACT Prolite Flywheel
Similar to its sibling, the ACT 600350 XACT Prolite Flywheel offers the same core benefits of improved throttle response and acceleration. Its lightweight design is central to reducing engine load, making it a popular choice for those looking to sharpen their vehicle’s performance characteristics.
This model also benefits from the robust manufacturing processes ACT is known for, including a heat-treated forging and an induction-hardened ring gear for maximum service life. The one-piece construction ensures structural integrity under high stress, providing peace of mind for aggressive street use or track applications.
ACT SB11-HDSS Clutch Kit with Streetlite Flywheel
This ACT SB11-HDSS package is a complete solution for your clutch upgrade needs, bundling a high-performance clutch with a Streetlite Flywheel. This combination is engineered to work in perfect harmony, providing a significant boost in torque capacity and drivetrain response over stock components.
The kit is built with ACT’s commitment to “Excellence in Performance” and is backed by a strong one-year warranty. Opting for a matched kit like this ensures compatibility and optimized performance, saving you the hassle of sourcing individual components separately.
ACT 600105 ProLite Xact Flywheel
The ACT 600105 ProLite represents the pinnacle of lightweight design from ACT, being their lightest flywheel option. It is specifically engineered for drivers who prioritize maximum engine response above all else. The significant weight reduction allows for extremely quick revving, which is particularly beneficial in racing or autocross scenarios.
Despite its minimal weight, this flywheel does not sacrifice strength. It is designed to be both affordable and durable, offering a high-performance upgrade that is accessible to a wide range of enthusiasts looking to extract every bit of responsiveness from their engine.
Fidanza Aluminum Flywheel for Toyota Supra Turbo
This Fidanza Aluminum Flywheel is meticulously designed for the 1993-1998 Toyota Supra Turbo with the 2JZ-GTE engine. It is engineered to perfectly match the vehicle’s high-performance characteristics, offering a substantial reduction in rotational mass for improved turbo spool and engine acceleration.
Fidanza stands behind this product with robust technical support and a strong warranty of 12 months or 12,000 miles. This commitment ensures that you are investing in a quality component that is backed by the manufacturer, providing confidence in your purchase for your high-performance build.
ACT Flywheel For Hyundai Genesis Coupe | XACT Streetlite
This ACT XACT Streetlite Flywheel, part number 600725, is a direct-fit upgrade for the 2010-2012 Hyundai Genesis Coupe. It is manufactured from high-quality materials to ensure a perfect fit and reliable performance, making it a straightforward install for a guaranteed improvement in drivetrain response.
By reducing rotational mass, this flywheel helps the Genesis Coupe’s engine rev more freely, enhancing the sporty character of the vehicle. It’s an ideal upgrade for owners looking to improve the sharpness of their daily driver or track car without extensive modifications.
ACT Streetlite Flywheel for Honda Civic
The ACT Streetlite Flywheel is a popular choice for Honda Civic owners seeking to enhance their car’s performance. This model is designed to offer a balanced combination of improved throttle response and maintained drivability, making it well-suited for both daily commuting and spirited driving.
As part of the Streetlite series, it provides a noticeable reduction in weight compared to the stock unit. This upgrade can make gear changes feel crisper and improve acceleration, giving your Civic a more agile and responsive feel on the road.
ACT Prolite Flywheel for Subaru WRX
Engineered for the turbocharged Subaru WRX, the ACT Prolite Flywheel is built to handle the increased power and demand for quick spooling. Its lightweight design reduces rotational inertia, which can lead to faster turbo response and improved acceleration through the gears.
This flywheel is constructed to meet the high standards of durability required for performance Subarus. It’s an excellent component for WRX owners who are modifying their vehicles for more power and want a drivetrain that can keep up with the engine’s potential.
Buying Guide: What to Look For in the Best ACT Flywheel
When I was looking for a new flywheel for my project car, I quickly learned that ACT offers a few different styles, and picking the right one matters a lot for how the car will feel. It is not just about grabbing the first one you see. Your main choice is between a lightweight flywheel and a heavy-duty stock replacement. A lightweight flywheel, like the ACT Streetlite, is a popular upgrade. It reduces rotational mass, which lets the engine rev up and down much faster. This makes the car feel more responsive, especially when you are shifting gears quickly. The trade-off is that it can make smooth take-offs from a stop a bit trickier until you get used to it, and sometimes you might hear a bit more gear chatter at idle.
On the other hand, if you are building a car for pure torque and drag racing, or if you just prefer the predictable, dampened feel of a stock clutch engagement, the ACT Prolite is a better fit. It is heavier than the Streetlite but still lighter than most factory flywheels. This extra mass helps with launching the car off the line by storing more kinetic energy. Think of it like a spinning top; a heavier one is harder to stop. For a daily driver where smoothness is my top priority, I would lean towards the Prolite or even a standard replacement flywheel.
You also need to make sure the flywheel is the right one for your specific car. ACT makes flywheels for a huge range of vehicles, but engine code, model year, and transmission type all matter. Getting the wrong one means it simply will not bolt up to your crankshaft or work with your clutch. Another critical step is checking whether your new flywheel needs to be resurfaced. Even a brand-new flywheel can sometimes have minor surface imperfections. A quick pass on a resurfacing machine ensures a perfectly flat, clean surface for the clutch disc to grip onto, which is key for long life and proper performance. Finally, remember that this is a job where torque specs are not suggestions. You must use a torque wrench and follow ACT’s specified pattern and values when bolting the flywheel to the crankshaft. An unevenly or improperly torqued flywheel can cause vibrations and even damage.
FAQ
Can I install an ACT flywheel myself?
Yes, you can, but I will be honest, it is a big job. You need to drop the transmission to get to the flywheel, which requires a good set of tools, jack stands, and a transmission jack for safety. You also need a torque wrench to ensure the flywheel and pressure plate bolts are tightened to the exact specifications from ACT. If you are not comfortable with this level of mechanical work, it is best left to a professional shop. A proper installation is critical for safety and performance.
What is the difference between a street and pro ACT flywheel?
ACT’s “Street” series flywheels, like the Streetlite, are designed for street performance and occasional track use. They are lightweight for faster revving. The “Pro” series, like the Prolite, are a bit heavier and are aimed more at serious drag racing or high-torque applications where that extra rotational mass helps with launches. For my daily-driven street car, the Streetlite is usually the perfect balance.
Do I need to resurface a new ACT flywheel?
It is highly recommended. Even though it is new, the flywheel surface might have minor imperfections or a protective coating from the factory. Getting it professionally resurfaced ensures a perfectly flat and clean surface for the clutch disc to mate with. This prevents premature clutch wear, chatter, and slipping. It is a small extra step that makes a huge difference in the longevity of your whole clutch assembly.
Will a lightweight flywheel cause my car to stall more easily?
It can, especially when you are first getting used to it. Because there is less rotating mass, the engine loses RPMs faster when you push in the clutch. This means you need to be a little more deliberate with giving it gas when taking off from a stop. After a week or so of driving, your left foot will adapt to the new engagement point and it becomes second nature. It is a trade-off for the much faster engine response you get the rest of the time.
What tools are essential for an ACT flywheel installation?
Beyond standard socket sets and wrenches, you will absolutely need a torque wrench, a clutch alignment tool (usually provided with a new clutch kit), and a way to safely support the vehicle and lower the transmission. This means using sturdy jack stands and a transmission jack. You should also have some thread locker for the flywheel and pressure plate bolts, and a breaker bar for stubborn bolts. Reading through a complete installation guide for the 9 best ACT flywheel reviews and installation guide before you start is a very smart move.