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Professional Series Forged Nitrous Piston Set for Chevy Big Block, 4.625 in. Bore, 1.120 in. Compression Height, +38cc Dome
InfoVehicle Info Needed
WISECOPART NUMBER: 926-K427B125

Professional Series Forged Nitrous Piston Set for Chevy Big Block, 4.625 in. Bore, 1.120 in. Compression Height, +38cc Dome

$1,16199
ShippingShips on 11/13/2026
Lowest PriceLowest Price Guarantee

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Forged Piston Set
  • Chevy Big Block
  • 4.625 in. Bore
  • 1.120 in. Compression Height
  • +38cc Dome
  • 0.99 in. Floating Wrist Pin Included
  • 2618 Forged Aluminum
  • ArmorGlide Coated Skirt
  • Set of 8

    This Wiseco Professional Series piston set is forged from 2618 aluminum for Chevy Big Block engines, including nitrous builds. Each of the 8 pistons has a 4.625 in. bore and a 1.120 in. compression height with a +38cc dome. Professional Series pistons are aimed at heavy to severe duty race builds.

    Wiseco K427B125 Piston Set Features:

    • Made for Chevy Big Block engines
    • 4.625 in. bore diameter with a 1.120 in. compression height
    • +38cc dome volume
    • Forged from 2618 aluminum alloy
    • ArmorGlide skirt coating for reduced friction, scuff resistance and quieter operation
    • 0.99 in. 52100 Steel floating wrist pin included
    • Piston rings sold separately
    • Fully machined crown with precision ring grooves and an anti-detonation groove
    • Forced pin oiling feeds the wrist pin bore
    • Set of 8 pistons
    • Part TypePiston
    BrandWISECO
    Package Height4.2
    Package Width9.0
    Package Length23.0
    Weight16.8 PG
    Part CategoryPerformance Parts
    Piston Pin Outside Diameter0.99 in.
    Piston Head Volume (Cc)+38cc
    Compression Height1.120 in.
    Piston Head TypeDome
    Wrist Pin StyleFloating
    QuantitySet of 8
    Piston Material2618 Aluminum
    Part FitmentUniversal
    Bore Diameter4.625 in.
    Wrist Pin IncludedYes
    Piston Quantity8
    Piston Pin Material52100 Steel
    Vendor Part NumberK427B125
    Package Qty1
    Package TypeEA
    Some parts are not legal for use in California or other states with similar laws / regulations
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