You can reduce the power loss and free up some horsepower in your driveline by switching to a lightweight flywheel, such as this aluminum Lexus IS300 flywheel from Fidanza.

Fidanza claims it's around 40% lighter than the OEM Lexus IS300 flywheel. This doesn't change how much horsepower your engine produces but frees up additional horsepower that would otherwise be consumed by a heavier flywheel. The lighter weight also means a lower Moment of Inertia (MOI), allowing the engine RPM to climb and drop more quickly, improving throttle response.

This is a great upgrade if you've done some performance modifications and want to free up additional horsepower for track or autocross use, or if you're in the process of replacing other driveline components and want to get more done while you're at it. Note that lightweight flywheels may make it more difficult to get the car going from a standstill, so it won't be the ideal upgrade for daily-driven cars.

Key Features:

• Heat-treated friction plate for optimum grip and durability. Friction plates are bolt-ons and replaceable.
• Replaceable hardened 1050 steel ring gear.
• Balanced weight; not too light that it will cause idling and other driving issues.