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Dyno-Mite Performance billet crank. Available with a 3.62 stroke (3.7 litres) or 3.82 stroke (3.9 litres. Billet cranks are recommended when you want to push your Barra way over that 1000hp mark.
 
4340 solid billet steel, Cryogenic tempered, nitrided, isotropic finished.
Made in Australia.
These are not light for postage and weigh approximately 33 kg each.