Pro Series™ forged crankshafts are top of the line units, manufactured
from the highest quality 4340 certified steel. Our 4340 steel forgings
meet aircraft quality standards for material cleanliness and purity.
Every crank is American forged, American machined and quality checked to
meet our exact specifications including: a shaft surface finish of
grade 5 RMS or better, journal radii are ground to .140 inch, roundness
of each journal is .0001 inch or less and each rod journal is drilled
with a 7/8 inch or 3/4 inch lightening hole to reduce the inertia weight
of the crankshaft. The Pro Series™ by Lunati is engineered with high
performance street and all-out race engines in mind.
Pro Series™ Crankshafts have been successfully used in 1,500+ hp
applications.Pro Series™ crankshaft for Chevrolet LS1, LS2, LS6 applications
- Stroke: 4.500 in.
- Main Bearing: 2.559 in.
- Rod Journals: 2.100 in.
- Minimum Rod Length: 6.125 in.
- Crank Weight: 50 lbs.
stroke crankshafts may require additional balance work not covered in
the listed price. Please call for additional information.