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Eagle "ESP" Forged 4340 Steel Crankshaft - SB Chevy - 4.000" Stroke - 350 Mains - Internal Balance - 1855 Bobweight - 4340 - Must Use 6.000" Rod or Longer - Early (2 Pc Seal) SB Chevrolet

Crankshaft, 4.000 in Stroke, Internal Balance, Forged Steel, 2 Piece Seal, Small Block Chevy, Each
Limited Supply: only 8 remaining
Availability: Same Day Shipping!
Shipping: FREE SHIPPING! Oversize Fees Waived On This Item! Ships from Michigan.
Was: $835.99
Sale: $826.97
Save: 1%
Save: $9.02

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Eagle forged 4340 steel cranks feature a non-twist forging, .125" fillet radiuses for superior strength so chamfered / narrowed bearings required, nitrided surface, &

  • micropolished to <
  • 2 ra. Intended for the most demanding application

    Forged 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 products and package in their boxes without having any control or input in production. Eagle uses only certified steel in production of their steel cranks and rods. No shortcuts are taken that might compromise the quality of the finished piece. We use multi-stage heat treating, sonic testing, magna-fluxing, and x-ray to ensure a reliable product. While Eagle may not be the least expensive
  • .125" fillet radiuses for improved strength and rigidity. Chamfered or narrowed bearings must be used!
  • Selection: Our selection is the most comprehensive in the industry with close to 200 different connecting rods, over 200 crankshafts, and 2400 balanced rotating assemblies. We offer premium forged 4340 crankshafts and H-Beam rods for serious performance applications, and quality cast steel cranks and I-Beam rods for the weekend racer.
  • Quality: Unlike some manufacturers, Eagle never compromises quality for the sake of a lower price. We use only the newest, state-of-the art equipment and highly skilled craftsmen to produce every part we sell. All rods and crankshafts are thoroughly inspected and quality controlled to insure that every part is suited for the most demanding applications.
  • X-Rayed, magnafluxed and sonic tested to insure quality.
  • Shot-peened and stress relieved to improve fatigue resistance.
  • With over 75,000 sq. ft. of combined production and inventory in the U.S.A., most orders can be shipped within 24 hours! Our sales staff has over 85 years of combined experience in the automotive performance aftermarket industry to better serve you.
  • Nitrided surface for superior wear protection.
  • Optimized oiling passages for improved journal oiling.
  • Micropolished journals feature 2 RA or better.
  • Target bobweight guaranteed +/- 2% for more predictable balancing.

    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.

  • PROP 65

    This product can expose you to chemicals including Nickel, which is/are known to the State of California to cause cancer


    • EAG435040006000
    • EAG435040006000
    • 7.93348E+11
    • Eagle Specialty Products
    • Available
    • Same Day Shipping!
    • New


    Shipping Information

    • Item Requires Shipping
    • 56.6 lbs.
    • W8.3000” x H9.2000” x L28.2000”
    • Shipping
    • This item ships in its own box.
    • FREE SHIPPING! Oversize Fees Waived On This Item! Ships from Michigan.

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