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Product Summary

LS1, LS2, LS3, LS4, LS6, 4.000" Stroke

  • Shot peened, heat treated, precision ground & ion nitrided for superior strength
  • Rough balanced and reluctor wheel installed
  • Keyway cut for damper
  • 58-tooth reluctor wheel (2006 & later) engines
  • 4.000 Inch Stroke

Key Specs

MFG. Part #4LS140065
BrandScat

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Details

For over 50 years, SCAT has been manufacturing crankshafts for a wide range of applications in their 42,000-square-foot facility in Redondo Beach, California. SCAT has two complete crankshaft lines capable of machining raw forgings or billets into finished crankshafts. Below are photos of SCAT’s machining centers that house over 20 CNC machines. SCAT has the ability to make crankshafts for Chevy, Ford, Chrysler, and Pontiac, as well as Motorcycle and Tractor applications. With a product line that includes off-the-shelf cast and forged cranks and the ability to make custom cranks to a customer’s unique requirements, SCAT is truly a one-stop shop for your crankshaft needs.

LS1 - 6-Bolt 4340 Forged Crankshaft

  • Shot peened, heat treated, precision ground & ion nitrided for superior strength
  • Rough balanced and reluctor wheel installed
  • Keyway cut for damper
  • 58-tooth reluctor wheel (2006 & Later) engines
  • 4.000 Inch Stroke
  • 6.125 Inch Rod Length

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Specifications

KEY SPECS
MFG. Part #4LS140065
BrandScat
GENERAL
Stroke4.000"
Main Journal StyleLS mains
Crankshaft MaterialForged 4340 Steel
Main Journal Diameter2.750"
Rod Journal Diameter2.100"
Rear Main Seal Style1-piece
Connecting Rod Length6.125"
Engine BalanceInternal
Narrowed BearingYes
Main Bearings IncludedNo
Connecting Rod Bearings IncludedNo
Snout TypeStandard
GTIN Code846091047858
Notes58-tooth reluctor wheel (2006 & later engines)
Sold in QuantityEach