As the premium line of cranks offered by Lunati, Signature Series Crankshafts are the strongest you will find for your engine. The specialized non-twist 4340 forged steel construction comes completely profiled and detailed to our racing specs. Many design features such as gun-drilled mains, lightened rod journals, micropolished journals and a windage reducing contoured wing counterweight profile make the Signature Series the best choice for serious racers.
All rod journals have drilled lightening holes to reduce the inertia weight of the crankshaft.
All journal radiuses 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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