[s-cars] Underdrive pulleys?

[Joseph Pizzimenti]

I was wondering what detrimental effect, if any, would
a lightened underdrive pulley have on the drivetrain?
Would I bend rods and/or twist the crank?  These
pulleys are zero-balanced, would using these with a
stock dual mass flywheel damage anything?
This is going on a 2.7T motor, otherwise stock with
the exception of engine management and exhaust
modifications.

Thanks

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