Chevy LS1 Forged 4340 Steel Crankshaft 4.125" Stroke

Name: Chevy LS1 Forged 4340 Steel Crankshaft 4.125" Stroke
Brand: EAGLE
SKU: 356-434641256100
Price: 1177.99 USD
Availability: InStock

^$1,177⁹⁹

Ships on 09/18/2026

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GM LS

Chevy LS1 Forged 4340 Steel Crankshaft

4.125" Stroke

Internal balance

2.100" Rod Journal

2.559" Main Journal

6.125" or longer Rod

55 lbs.

24-Tooth Reluctor

Requires narrowed bearings

Part TypeCrankshaft

BrandEAGLE

Package Height8.5

Package Width9.0

Package Length32.5

Weight56.1 PG

Part CategoryPerformance Parts

Rod Journal Diameter2.1 in (53.3 mm)

Main Journal Diameter2.559 in (64.999 mm)

Part FitmentSemi Universal

ToolStroker Combinations

Engine Stroke4.125 in (104.775 mm)

Vendor Part Number434641256100

Package Qty1

Package TypeEA

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Some parts are not legal for use in California or other states with similar laws / regulations

Chevy LS1 Forged 4340 Steel Crankshaft 4.125" Stroke

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