Eagle Standard Forged 4340 Chromoly Steel

SKU: EAG428137505850

Crankshafts

EAG Crankshafts - 8 Cyl...

Eagle

Eagle Standard Forged 4340 Chromoly Steel

SKU: EAG428137505850

Crankshafts

EAG Crankshafts - 8 Cyl...

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 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.

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.

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
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:	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

Application Summary

Ford 4.6L MODULAR V8

Part Type

Engine Crankshaft

Data: v4.2 - Upd: 2026-10-13 18:08:57

Specifications

Product Attributes - Brand: Eagle Specialty Products
Product Attributes - Manufacturer's Part Number: 428137505850
Product Attributes - Part Type: Crankshafts
Product Attributes - Product Line: Eagle Forged 4340 Steel Crankshafts
Product Attributes - UPC: 793348006963
Product Attributes - Engine Stroke (in.): 3.750 in.
Product Attributes - Crankshaft Material: Forged 4340 steel
Product Attributes - Engine Balance: Internal
Product Attributes - Rear Main Seal Style: 1-piece
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.): 1.889
Product Attributes - Main Journal Diameter (in.): 2.657 in.
Product Attributes - Balancer Bolt Thread Size: M12 x 1.5
Product Attributes - Crankshaft Snout Style: Standard
Product Attributes - Weight: 50.000 lbs.
Product Attributes - Quantity: Sold individually.
Product Attributes - Notes: Honda rod journals. This crankshaft features center counterweights for added strength at high RPM, which may require block clearancing.

Reference Information

Brand Name/s	Eagle
StreetFX SKU	eag428137505850
SFX Item ID	4052968
Supplier Item Code	4052968
Manufacturer SKU	428137505850
Manufacturer UPC	793348006963
Alternative References	ESP-428137505850