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After years of service
Magnum crankshafts by Callies
have established themselves
as one of the most durable
competition crankshafts ever
produced, Magnum crankshafts
are manufactured from ultra
pure AISI 4340 steel. Callies
then subjects this material
to multiple heat treatments,
resulting in a crankshaft
that has unsurpassed wear and
strength characteristics. All
Magnum cranks feature Callies
Ultra-Case heat treatment.
Each Magnum crank
will have gun drilled mains
and fully profiled
counterweights, regardless of
engine type.