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Signature Series Crankshaft - Chevrolet Big Block 4.750

Signature Series Crankshaft - Chevrolet Big Block 4.750" Stroke (2-Piece Rear Main)

Lightweight X-Beam Rod Single - GM LS, GM Gen V LT

Lightweight X-Beam Rod Single - GM LS, GM Gen V LT

Signature Series Crankshaft - Ford 351 Windsor Small Block 4.100" Stroke

$1,792.95
Lunati Signature Series Premium line of Crankshafts are the best choice for serious racers and the strongest you will find for your engine!
TEMPORARILY OUT OF STOCK
SKU
60641001LUN
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 Lunati crankshafts MUST use narrow or chamfered main and rod bearings. Proven to withstand over 1500 horsepower applications.

Features:

  • All rod journals are drilled with either 7/8" or 3/4" 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
More Information
UPC 788120790215
Manufacturer Lunati®
Series Signature Series
Stroke 4.100 in
Main Journal O.D. 2.750 in
Rod Journal O.D. 2.100 in
Rec. Minimum Rod Length 6.200 in
Rod Journal Width 1.900 in
Connecting Rod Small Block Chevy
Material 4340 Non-twist Forged Steel
Lightening holes Yes
Nitride heat treated Yes
Micropolished Journals Yes
Installation Notes
  • All Lunati crankshafts MUST use narrow or chamfered main and rod bearings.
  • Ford Small Block – 351W w/ 351C main crankshafts may be used with stock Windsor blocks using bearing spacer kit #MS2255SEMI and #MS2256H or #MS2256HX bearings; Ford Small Block – 351W w/ 351C main crankshafts may be used with stock Cleveland blocks with a Ford Racing crank gear spacer and Windsor timing set.
Emissions Code
Application Application Specific