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Old 12-02-2006, 08:07 PM
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Rotational weight is almost irrelavent.

A 2 1/2 inch shaft will never hold the power, it will twist like a candy cane.
Diameter is more important than wall thickness. Start thinking 3 1/2 for performance.

Aluminum driveshafts are much better at high speeds when the shaft rpm is way up there.
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