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Chevy 427ci Hypereutectic Pistons Hollow Dome .180"
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UNITED ENGINE MACHINEPART NUMBER: 648-KB176.030

Chevy 427ci Hypereutectic Pistons Hollow Dome .180"

$51247
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Chevy 427ci
  • Dome Top Pistons
      • Chevy 427ci Hypereutectic Pistons
    • Hollow Dome .180''
    • 4.280'' Bore (+.030'')
    • Use w/6.135'' Connecting Rod & 3.760'' Crank Stroke
    • Comp. Ratio: 11.0/90cc; 10.1/105cc; 9.8/108cc; 9.0/119cc
    • 8/pkg

      Technical Specs:
    • Alloy: Hypereutectic 390
    • Bore: 4.280'
    • Crankshaft Stroke: 3.760'
    • Connecting Rod Length: 6.135'
    • Deck Height: 9.800'
    • Compression Height: 1.765'
    • Pin Size: 0.990'
    • Pin Location: Centered
    • Hollow Dome Top: .180' 17cc IV (Closed Chamber Head)
    • Intake Valve Relief: 0.267' Depth / 2.310' Diameter
    • Exhaust Valve Relief: N/A
    • Top Landing Height: 0.311'
    • Ring Grooves: 5/64' Top; 5/64' Middle; 3/16' Bottom
    • Gram Weight: 705/158
    • Compression Ratio: 11.0:1 w/96.5cc Heads; 10.1:1 w/105cc Heads; 9.8:1 w/108cc; 9.0:1 w/119cc Heads

    100% CNC Machined Pistons

    New high silicon alloys and diamond tooling have give Keith Black designers the material and equipment for performance breakthroughs in engine design. KB piston are 100% CNC machined and T-6 heat treated from 16%-18% silcon Hypereutectic alloy. Features include drilled oil returns and pin oil supply, .072'' spiral wound retaining ring, 100% diamond turned, compensated high strength ring lands, high top ring location, 360° pressure pin oiling, diamond honed pin hole and lightweight rigid rib skirt design.

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    Features:

    • 390 Hypereutectic alloy with 16% Silicon
    • Fully machined crowns and valve reliefs
    • Drilled oil drain backs
    • Full floating wrist pins
    • Triple wound spiral locks
    • Reflective alloy allows 2% power increase
    • Quench dome technology minimizes deterioration
    • Zero deck quench designs
    • Sold in Sets (except when noted as 1 piston per package)


      Click here for reference guide to piston top designs
    Part TypePiston
    Product LineUEM Pistons KB Signature Series Hypereutectic Big Block Chevy Pistons
    BrandUNITED ENGINE MACHINE
    Package Height3.9
    Package Width9.2
    Package Length18.3
    Weight16.6 PG
    Part CategoryPerformance Parts
    Part FitmentSemi Universal
    Vendor Part NumberKB176.030
    Package Qty1
    Package TypeEA
    Please click here to download the instructions PDF file

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