fidnaza flywheel

[Stormhammer]

Less engine rotational mass is always a good thing.

Actually not always. More engine rotational mass means more intertia that keeps the engine spinning, therefore keeps the RPMs up when shifting ( less loss of rpms ) - whereas with a Fidanza 7lb flywheel, everytime you shift, your RPMs will drop pretty fast due to less rotational mass. But you'll rev up faster. So it all depends in your application ( if it came down to motorsports )