Was looking to buy the inexpensive Vidanza Aluminum Flywheel for my 2004 WRX, just wondering how lightened flywheels perform with stock clutches. Anyone have experience with this? Do I have to go upgraded clutch at the same time?

 

You don't have to do the clutch, but if you have plans for one later, its easier to do them both at once, since you already have it all apart.