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Eagle Chevy LS1 24 Tooth Reluctor 4140 Chromoly Forged Crankshaft

SKU: EAG434641256100

Crankshafts

EAG Crankshafts - 8 Cyl...

Eagle Chevy LS1 24 Tooth Reluctor 4140 Chromoly Forged Crankshaft

SKU: EAG434641256100

Crankshafts

EAG Crankshafts - 8 Cyl...

A$2,588.34
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

Eagle forged 4340 steel Cranks feature a non-twist forging, .125" fillet radiuses for superior strength so chamfered / narrowed bearings required, nitrided surface and micropolished. Intended for the most demanding applications. Includes 24 tooth reluctor.

Product Overview

Eagle Crankshafts feature exceptional strength and quality at a reasonable price. Eagle cranks are forged in a non-twist forging and undergo a multi-stage heat treatment process as well as stress relieving, shot peening, and nitriding. They are magnafluxed and sonic tested to insure quality. Every journal is micropolished to a 3 or better R.A. On all journals, a 0.125” radius is used to increase strength, so chamfered bearings must be used. The perfect choice for engines up to 1500HP! *4340 Steel Crankshafts* Eagle forged 4340 steel crankshafts are forged from SAE 4340 steel, feature a non-twist forging, multi-stage heat treat process, stress relieving, shot-peening, and nitriding for superior strength and reliability in the most demanding applications. Each journal is micropolished to a 3 r.a. or better. A .125” radius is used to increase strength, so chamfered bearings must be used. All use a Ford rod journal width regardless of journal diameter. All are designed for internal balance. These are the perfect choice for applications up to 1500 hp. Eagle Forged 4340 Steel Crankshafts are also available in 'Lightweight' versions - Counterweights are knife-edged for reduced weight and less windage. Typical weight reduction is 5-6 lbs. *Cast Steel Crankshafts* Eagle cast steel crankshafts offer an excellent alternative to a factory cast crank. All radii are .092” so O.E. style bearings can be used. Target bobweight is +/- 2% GUARANTEED! Recommended for use up to 500hp. Designed for 28 in-oz. external balance.

Product Details

Balance Type:Internal
Bobweight:1800
Crankshaft Stroke:4.125"
Description:Forged Steel Crankshaft; 24T Reluctor
Engine Stroke:4.125
Flywheel Bolt Count:6
Flywheel Register Diameter:call
Intended Balance:internal
Main Journal Diameter:2.559
Main Journal:2.559"
Material:Forged 4340 steel
Min. Rod Length:6.125"
Minimum Rod Length:6.125
Part Number:eag434641256100
Pilot Bore Diameter:call
Prop 65 (C, R or CR):C
Prop 65 - Long Label:This product contains nickel, which is known to the State of California to cause cancer.
Prop 65 - Short Label:Prop65 warning.jpg
Prop 65 Long:This product contains nickel, which is known to the State of California to cause cancer.
Prop 65 Warning Chemical Listing:Nickel
Prop 65 Yes/No:Yes
Rear Seal Diameter:call
Rod Journal Diameter:2.1
Rod Journal Width:1.900"
Rod Journal:2.1
Snout Diameter:1.48"
Stroke:4.125"
Target Bobweight:1800g
Title:Eagle Specialty Products - Forged 4340 Steel Crankshaft

Application Summary

CHEVY LS1

Part Type

Engine Crankshaft

Data: v4.2 - Upd: 2026-10-13 18:08:59

Specifications

Product Attributes - Brand
Eagle Specialty Products
Product Attributes - Manufacturer's Part Number
434641256100
Product Attributes - Part Type
Crankshafts
Product Attributes - Product Line
Eagle Forged 4340 Steel Crankshafts
Product Attributes - UPC
793348007861
Product Attributes - Engine Stroke (in.)
4.125 in.
Product Attributes - Crankshaft Material
Forged 4340 steel
Product Attributes - Engine Balance
Internal
Product Attributes - Rear Main Seal Style
1-piece
Product Attributes - Reluctor Wheel Tooth Quantity
24
Product Attributes - Lightened
No
Product Attributes - Requires Narrow Bearings
Yes
Product Attributes - Rod Bearings Included
No
Product Attributes - Main Bearings Included
No
Product Attributes - Rod Journal Diameter (in.)
2.100
Product Attributes - Main Journal Diameter (in.)
2.559 in.
Product Attributes - Balancer Bolt Thread Size
M16 x 2.0
Product Attributes - Crankshaft Snout Style
Custom
Product Attributes - Weight
55.000 lbs.
Product Attributes - Quantity
Sold individually.
Product Attributes - Notes
Crankshaft has 24-tooth reluctor wheel installed.

Reference Information

Brand Name/s Eagle
StreetFX SKU eag434641256100
SFX Item ID 4052703
Supplier Item Code 4052703
Manufacturer SKU 434641256100
Manufacturer UPC 793348007861
Alternative References ESP-434641256100, LS1

Compatibility

CHEVY LS1

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