After changing mine and looking at the both my *** started hurting from the screwing... I was slightly disappointed because I thought there would be more of a noticable difference. I couldn't tell a difference in driving either. I hope it was worth it, either way it wes too late now. It sure does look a whole lot better than the stocker...but who sees it???

 

A light flywheel will cause the car to bog down when you start out in first gear, but after that the car will rev faster than normal. Stock flywheels are better for the drag strip, if most of your racing is done from a roll on then the lightweight flywheel is better.

It's a personal preference.