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Eagle

Eagle BBC 4340 Forged Crank - 4.250 Stroke

MPN: 445442526385 Catalog #: 001596670 Category: Crankshafts Check Vehicle Fitment

Product Details

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.

Forged 4340 Steel Crank - Chevrolet 454, 4.250 Stroke, INTERNAL BALANCE, CENTER COUNTERWEIGHTED.

Crankshaft - 4.250 in Stroke - Internal Balance - Forged Steel - 2-Piece Seal - Big Block Chevy - Each

Center Counterweights CROSS DRILLED OILING

Crankshaft must be balanced to match your specific rods and pistons

FORGED 4340 STEEL CRANK - CHEVROLET 454, 4.250 STROKE, INTERNAL BALANCE, CENTER COUNTERWEIGHTED

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, & micropolished to < 2 ra. Intended for the most demanding applications.

FORGED 4340 STEEL CRANK - CHEVROLET 454, 4.250 STROKE, INTERNAL BALANCE, CENTER COUNTERWEIGHTED

  • material: forged 4340 steel
  • intended balance: internal
  • target bobweight: 2300g
  • stroke: 4.250
  • rod journal: 2.2
  • rod journal width: 2.000
  • main journals: 2.749
  • minimum rod length: 6.385
  • typical weight: 74 lbs.
  • rear seal diameter: 2.630 - 2.635
  • snout diameter: 1.6
  • flywheel bolts: 6
  • pilot bore diameter: 1.094

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, & micropolished to < 2 ra. Intended for the most demanding applications.

Vehicle Fitment

Universal or product-specific fitment. Please review the product details and contact us if you need help confirming fitment before ordering.

Engine Compatibility

GM - BBCMatched variant: BBC

Big Block Chevy; 396/427/454/572

Fitment note: Engine compatibility is provided as a guide. Please verify all fitment details before ordering.

Product Specs

Brand
Eagle
Part Number
445442526385
Catalog Number
001596670
Product Line
Crankshafts
Category
Engines & Parts
Type
Crankshafts
UPC / Barcode
793348020402
Vendor Product Category
Engine Components
Vendor Product Subcategory
Crankshafts
Length
32.50 in
Width
9.00 in
Height
8.70 in
Weight
80.86 lb
Units Per SKU
1
Freight / LTL
No
Ship Alone
Yes
Air Restricted
No
Prop 65
Y
CARB Approved
Yes
Clearance Item
No

Shipping & Availability

Current status 12 Available - Ready to ship
Estimated timing Usually ships within 24hrs

This item is showing available inventory. Most in-stock performance parts ship quickly, but timing can vary by warehouse, vendor cut-off time, holidays, and carrier pickup.

PROP 65 WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Inventory shown: 12 available as of 6/4/2026.

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