Billet flywheels

#1
Are all the billet flywheels light weight? What does the stock wheel weigh?
In my (mud motor) application, I need a low rpm idle, under a load so I need a good heavy flywheel, more than I need quick throttle response. But I'd like to have one that can take some RPM's. Does anyone make a steel turned flywheel that's close to the stock weight?
Thanks for any input?
Greg
 
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