Most stock oe flywheels are heavy cumbersome cast iron items that have been designed for optimum driveability by storing some of the engines power in the form of inertia. Lightened flywheels offer a solution for exploiting and freeing some of this stored/lost power by significantly improving engine response and acceleration.....the only cost in some cases is low end driveability (depending on weight of uprated flywheel). The benefits of an uprated and lightened ACT Flywheel are:
Quicker acceleration and increased throttle response
Maximum gear life - gear will not wear out or fall off
Serviceable - can be resurfaced with no need to purchase additional parts
Chrome-moly forgings three times more rigid than aluminum
Longer lasting because of heat treated friction surfaces
Excellent heat capacity from retaining adequate material behind the friction surface
Trouble-free single piece design
SFI certified to insure safety
The ACT Streetlite is preferred for fast road/street racing and is one of the most durable flywheels available on the market offering near stock driveability while still being considerably lighter than stock.