Click to enlargeEagle Forged Steel Crankshaft

Eagle 439637666135 Eagle ESP 4340 crankshaft

Chevrolet 396 402 427 forged steel crankshaft.

Designed for applications up to 1500 horsepower.

Internal balance.

Stroke is 3.7660 in.

Minimum rod length is 6.135 in.

Rod journal is 2.200 in. Main journal size is 2.749 in.

Rod journal width is 2.000 in.

Typical weight is 70 lbs. Bobweight is 2350.

Two piece rear seal design. Standard oiling design.

Has 6 flywheel bolt holes.

Snout diameter: 1.600 in.

Pilot bore diameter: 1.094 in.

TECH NOTE: Stock 427 stroke is 3.766" and the stock 396-402 stroke is 3.766". Standard 427 bore is 4.250" and standard 396 bore is 4.094". Standard 402 bore is 4.125.

TECH NOTE: Recommend main bearings MS829H and rod bearings CB743H.

The Eagle ESP Forged 4340 steel crankshafts feature a non-twist forging and undergo a multi-stage heat treatment process as well as stress relieving, shot peening, and nitriding. The Eagle ESP Forged 4340 steel crankshafts are magnafluxed and sonic tested to insure quality. Every journal is micropolished to a 3 or better R.A. A 0.125 radius is used to increase strength, so chamfered bearings must be used. All rod throws feature lightening holes to reduce weight. Target bobweight is +/-2%.

Eagle 439637666135 Chevy 396 427 forged steel crankshaft 3.766 stroke EAGLE-439637666135$769.97

Click to enlargeEagle ESP H-beam connecting rods
Chevrolet 502, 454, 427, 402, 396 connecting rods by Eagle CRS61353D. These are the matching connecting rods for use with the crankshaft shown above.

Stock length of 6.135".

Weight is 780 grams each.

Includes piston pins. Sold as a set of 8 connecting rods and 0.990" pins.

Eagle ESP H-Beam connecting rods are forged from 4340 steel and utilize 7/16" ARP capscrew style bolts with precision alignment sleeves that locate the rod cap to help maintain big end bore size and eliminate cap walk. Packaged in a weight-matched set (+or- 1 gram). Sizing is done on the state of the art Sunnen Krossgrinding system. All Eagle ESP Connecting Rods are multi-stage heat treated, magna-fluxed, and sonic tested. The Eagle ESP series connecting rods are manufactured from a two-piece forging. The forging process forces the grain into the shape of a connecting rod, resulting in a superior fatigue life. The rod cap is forged separately so that the grain runs perpendicular to the load forces, which strengthens the rod. Also, a higher content of nickel and chrome is used, which increases the strength and fatigue life without making the rod brittle. Extensive testing has proven the Eagle two-piece forging to be superior to any one-piece forging on the market! Eagle ESP connecting rods are the perfect choice for engines up to 850 horsepower. Sold as a set of 8 Eagle ESP H-Beam connecting rods.


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