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CRS-439637676135 Forged 4340 Steel Center Counterweighted Crankshaft for Chevy Big Block w/2-Piece Rear Seal [3.766 in. Stroke]
InfoVehicle Info Needed
EAGLEPART NUMBER: 356-439637676135

CRS-439637676135 Forged 4340 Steel Center Counterweighted Crankshaft for Chevy Big Block w/2-Piece Rear Seal [3.766 in. Stroke]

$1,29899
ShippingShips on 09/22/2026
Lowest PriceLowest Price Guarantee

Chevy Big Block
Forged 4340 Crankshaft
  • Chevy Big Block 396, 454 ci.
  • Center Counterweighted
  • Stroke: 3.766 in.
  • Min. Rod Length: 6.135 in.
  • Rod Journal: 2.200 in.
  • Main Journals: 2.749 in.
  • Intended Balance: Internal
  • Weight: 74 lbs
  • 2-Piece Rear Seal

    Eagle CRS-439637676135 Forged 4340 Steel Crankshaft Features:

    • Non-twist forging
    • Center counterweights for added stability at high RPM and high-power applications
    • .125 in. fillet radius for superior strength
    • micro-polished nitrided surface
    • Target bobweight: 2350 grams
    • Rod journal width: 2 in.
    • Snout diameter: 1.600 in.
    • Flywheel bolts: 6
    • Pilot bore diameter: 1.094 in.

    Eagle CRS-439637676135 Forged 4340 Steel Crankshaft Notes:

    • Chamfered or narrowed bearings are required for the .125 in. fillet radius
    • Crankshaft must be balanced to match your specific rods and pistons

      • Top-of-the-Line Competition Crankshafts

      Eagle Forged 4340 Steel Crankshafts are forged from ASME-certified 4340 steel in a non-twist forging and undergo an X-Ray inspection, magnafluxing, and sonic testing to ensure quality.

    Part TypeCrankshaft
    Product LineEagle Forged 4340 Steel Crankshafts
    BrandEAGLE
    Package Height9.0
    Package Width9.0
    Package Length32.0
    Weight69.0 PG
    Weight74 lb (33.56 kg)
    Part CategoryPerformance Parts
    Crankshaft MaterialForged 4340 steel
    Rear Main Seal Style2-piece
    Requires Narrow BearingsYes
    QuantitySold individually
    Engine BalanceInternal
    Vendor Part Number439637676135
    Package Qty1
    Package TypeEA
    No Questions
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