Your stock flywheel is good enough. If you are still having second thoughts call them. They say billet because RAM requires shatter proof flywheels which the stocker is. Trust me it is fine. But if money is no object and you dont mind spending money when you dont have to then light weight is the way to go. The aluminum has a steel facing. Either or is fine tho. I would stay with the stock one tho. Hell thats what I use.