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United Engine Machine Chevy 396/402ci Hypereutectic Pistons Hollow Dome .180"

United Engine Machine KB160.040
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United Engine Machine Chevy 396/402ci Hypereutectic Pistons Hollow Dome .180" $379.99
Chevy 396/402ci Hypereutectic Pistons
  • Hollow Dome .180''
  • 4.165'' Bore (+.070'' 396; +.040'' 402)
  • Use w/6.135'' Connecting Rod & 3.760'' Crank Stroke
  • Comp. Ratio: 10.5/96.5cc; 9.6/105cc; 9.4/108cc; 8.5/119cc
  • 8/pkg

  • United Engine Machine KB160.040 Details

    Chevy 396/402ci

  • Dome Top Pistons
  • Notes: For a 396ci engine, use part number 648-KB160.STD. This will be a 396ci .030 over bore. Compression ratio will be 10.3 on 96.5 head (Closed chamber head).

    Technical Specs:
  • Alloy: Hypereutectic 390
  • Bore: 4.165''
  • 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: 0.266'' 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: 630/158
  • Compression Ratio: 10.5:1 w/96.5cc Heads; 9.6:1 w/105cc Heads; 9.4:1 w/108cc; 8.5:1 w/119cc Heads

  • Specifications:

    Manufacturer's Part Number:

    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.


    • 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

    Some parts are not legal for use in California or other states with similar laws / regulations