Eagle "ESP" Forged 4340 Steel Crankshaft - SB Chevy - 3.480" - 400 Mains - Internal Balance - 1900 Bobweight - 4340 - Must Use 5.700" Rod or Longer - 400 CID SB Chevrolet H759C01M Daily performance use

Daily performance use

EZ Fuel + Ignition

Early release protection standard

but is now used throughout the motorsports industry

1999-2016 Ford E-350 Super Duty

Eagle "ESP" Forged 4340 Steel Crankshaft - SB Chevy - 3.480" - 400 Mains - Internal Balance - 1900 Bobweight - 4340 - Must Use 5.700" Rod or Longer - 400 CID SB Chevrolet H759C01M Daily performance useEagle forged 4340 steel cranks feature a non twist forging, . 125" fillet radiuses for superior strength so chamfered narrowed bearings required, nitrided surface, &amp micropolished to &lt 2 ra. Intended for the most demanding applicationForged AISI ASME certified 4340 steel with multi stage heat treatment for superior strength Service: Eagle connecting rods and cranks are designed and manufactured to our specifications. Some simply purchase generic