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Eagle Standard Forged 4340 Chromoly Steel

SKU: EAG428137505850

Crankshafts

EAG Crankshafts - 8 Cyl...

Eagle Standard Forged 4340 Chromoly Steel

SKU: EAG428137505850

Crankshafts

EAG Crankshafts - 8 Cyl...

A$2,554.94
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

Crankshaft - 3.750 in Stroke - Internal Balance - Forged Steel - 1-Piece Seal - Ford Modular - Each

Eagle Standard Forged 4340 Chromoly Steel

Eagle forged 4340 steel center-counterweighted Cranks feature a non-twist forging, center counterweights for added stability at high RPM and high-power applications. 125" fillet radiuses for superior strength so chamfered / narrowed bearings required, nitrided surface and micropolished. Intended for the most demanding applications.

Additional Information

Forged 4340 Steel Crank - Ford 4.6L MODULAR V8, 3.750" Stroke, 1.889" Rod JournalS.

Application Summary

Ford 4.6L MODULAR V8

Part Type

Engine Crankshaft

Product Overview

Eagle's commitment to quality and service has resulted in customer loyalty and satisfaction. This, in turn, has fueled rapid growth over the years. Eagle added crankshafts to our lineup a few years later as well as expanding our offerings in connecting rods. Continuous design improvements and improvements in materials and manufacturing techniques have resulted in Eagle being the largest and most respected aftermarket connecting rod and crank manufacturer in the industry. We never stop researching ways to make our products lighter, stronger, more efficient to manufacture, and more diverse. When you stop moving forward, you get passed by the competition.


Data: v2 - Desc: v4.2 - Upd: 2026-11-07 20:03:48

Data: v4.2 - Upd: 2026-11-07 19:55:46

Features

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Details

Balance Type:Internal
Crankshaft Stroke:3.750"
Description:Eagle Standard Forged 4340 Chromoly Steel
Engine Stroke:3.75
Flywheel Bolt Count:8
Flywheel Register Diameter:call
Intended Balance:internal
Main Journal Diameter:2.657
Main Journal:2.657"
Material:Forged 4340 steel
Minimum Rod Length:5.85
Part Number:eag428137505850
Pilot Bore Diameter:call
Rear Seal Diameter:call
Rod Journal Diameter:1.889
Rod Journal Width:1.900"
Rod Journal:1.889
Snout Diameter:call
Target Bobweight:1600g
Title:Eagle Specialty Products - Forged 4340 Steel Crankshaft

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Eagle, Eagle Specialty Products
StreetFX SKU eag428137505850
SFX Item ID 4052968
Accounting SKU eag-428137505850
Manufacturer SKU 428137505850
Manufacturer UPC 793348006963
Alternative References ESP-428137505850

Crankshaft, Internal Balance, Forged 4340 Steel, 3.750 in. Stroke, Ford, 4.6L, Each

Eagle forged 4340 steel crankshafts are great for high performance applications. They feature non-twist forging, undergo a multi-stage heat-treatment process, and are stress-relieved and shot-peened. These cranks are X-rayed, magnafluxed, and sonic-tested, so you know you're getting a top-quality piece. Each crankshaft has chamfered oil holes for improved oiling, a .125 in. radius on rod and main journals for increased strength, and the journals are precision-ground and micro-polished to less than 5 R.A. A target bob weight of +/- 2 percent greatly reduces balancing time. Many options are available; order the model recommended for your year/make and engine application.

Product Attributes
BrandEagle Specialty Products
Manufacturer's Part Number428137505850
Part TypeCrankshafts
Product LineEagle Forged 4340 Steel Crankshafts
UPC793348006963
Engine Stroke (in.)3.750 in.
Crankshaft MaterialForged 4340 steel
Engine BalanceInternal
Rear Main Seal Style1-piece
LightenedNo
Requires Narrow BearingsYes
Rod Bearings IncludedNo
Main Bearings IncludedNo
Rod Journal Diameter (in.)1.889
Main Journal Diameter (in.)2.657 in.
Balancer Bolt Thread SizeM12 x 1.5
Crankshaft Snout StyleStandard
Weight50.000 lbs.
QuantitySold individually.
NotesHonda rod journals. This crankshaft features center counterweights for added strength at high RPM, which may require block clearancing.

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