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An Alum driveshaft safety loop IMO ranks right up there with an Alum roll bar. Can be done, I sure would not do it, and likely not legal anywhere. Save weight with an alum DS first if that is the objective, which would give an Alum safety loop a fighting chance.



Aluminum driveshaft is likely to reduce rotational inertia if the diameter or thickness isn't increased too much. Aluminum driveshaft loop should be low on the weight savings list of things to do.