Made in USA
Signature Series Crankshaft Big Block Chevy
Product Discontinued
LUNATIPART NUMBER: 638-60443752

Signature Series Crankshaft Big Block Chevy

Currently Unavailable

This product is no longer available. Please call customer service for assistance at 1-800-345-4545.

Big Block Chevy
    Signature Series Crankshaft
  • Big Block Chevy
  • Stroke: 4.375"
  • Main Bearing O.D.: 2.750"
  • Rod Journal O.D.: 2.200"
  • Minimum Rod Length: 6.535"
  • Rod Journal Width: 2.000"
  • Connecting Rod: Big Chevy
  • 2-Piece Rear Main Seal

    MUST use narrow or chamfered main & rod bearings.
Part TypeCrankshaft
BrandLUNATI
Package Height6.0
Package Width10.0
Package Length27.5
Weight88.0 PG
Part CategoryPerformance Parts
Crankshaft MaterialForged 4340 steel
Rod Journal Diameter2.2 in (55.9 mm)
Main Journal Diameter2.749 in (69.825 mm)
LightenedYes
QuantitySold individually
Crankshaft Snout StyleStandard
Main Bearings IncludedNo
Engine BalanceInternal
Rod Bearings IncludedNo
Rear Main Seal Style2-piece
Balancer Bolt Thread Size (In.)1/2-20
Requires Narrow BearingsYes
Part FitmentSemi Universal
Engine Stroke4.375 in (111.125 mm)
Vendor Part Number60443752LUN
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
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