MAGNUM XL SBF 3.250 STROKE, 302W MAINS, 2.100 PINS, 4340

Description

Callies has once again
established a new standard
for lightweight crankshafts.
Magnum XL lightening profiles
result in crankshafts having
extremely high strength to
weight ratios. Material is
carefully removed from
non-stressed areas of each
shaft to eliminate parasitic
weight. The Callies Magnum XL
profile is effective at
minimizing windage within the
crankcase atmosphere. Oil
control is improved by not
relying on counterweight
undercutting to eliminate
weight.

All Magnum XL
crankshafts feature the
Callies Ultra-Case nitride
treatment. This heat
treatment method produces a
deep case that enhances
strength while creating an
extremely hard load bearing
wear surface. The Ultra-Case
process generates a layer of
hardened steel deep enough to
maintain its integrity even
after a -.010 regrind.

Each main and rod journal is
drilled for weight reduction
nse improvement.