Power is freed up when you use a Spec billet aluminum flywheel to transfer your engine's torque. The lightweight design allows the power to be used elsewhere, although you may not notice it while driving. Each Spec lightweight flywheel is built from biller aluminum that makes this stronger than other performance flywheels so it can handle any kind of power you throw at it. The Spec warranty also makes this a bigger player in the game since it is guaranteed not to break, or the company will replace it.
Being able to rev the car faster with the Spec flywheel does have its advantages, but also has disadvantages. The Spec lightweight flywheel is a perfect candidate for the track and road racing. It allows the car to accelerate much quicker out of the twists and turns. It is not ideal for the drag strip since a heavier flywheel like the Spec steel flywheel provides the vehicle with better launching capabilities off the line.
A lightweight aluminum flywheel will also have more chatter than your factory flywheel because of how light it is. For most aftermarket flywheels, this goes away within the first 500 to 1000 miles and is not any noisier than stock. Spec flywheels require proper break-in period which is about 500 miles or so. Once broken in, you can drive your vehicle as hard as you want without worrying about damaging your clutch and flywheel. For even better performance, use a Spec clutch kit with the Spec flywheel.