Based on the original Signature Series Crankshafts offered by Lunati, this series is designed to withstand the extreme pressures encountered when using a blower (Roots-type supercharger). Utilizing all of the original features of the Signature Series, these Signature Blower Crankshafts have .125" radii on the rods and mains, as well as dual keyways, larger nose bolt threads and enlarged flexplate flange threads.
Profiled and detailed non-twist 4340 forged steel construction.
All journal radii are ground to .125"; roundness of each journal is .0001" or less.
Pulsed plasma nitride heat treated for increased strength and durability.
Micropolished journals.
Note: All Lunati crankshafts MUST use narrow or chamfered main and rod bearings.
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