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United Engine Machine Hypereutectic Dish Top Pistons for Small Block Chevy 400 ci +.030 in. Overbore

United Engine Machine KB147.030


United Engine Machine Hypereutectic Dish Top Pistons for Small Block Chevy 400 ci +.030 in. Overbore $352.99
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Estimated to ship directly from the manufacturer on 08/20/18
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Hypereutectic Pistons
  • Small Block Chevy 400 ci
  • Dish Top
  • 4.155 in. Bore (+.030)
  • Use w/5.700 in. Connecting Rod & 3.750 in. Crank Stroke
  • Comp. Ratio: 10.8/58 cc; 10.4/62 cc; 10.2/64cc; 9.1/76 cc
  • Set of 8

  • United Engine Machine KB147.030 Details

    Chevy 400ci

  • Dish Top Pistons
  • Use w/5.700'' Connecting Rods
  • Technical Specs:
  • Alloy: Hypereutectic 390
  • Bore: 4.155''
  • Crankshaft Stroke: 3.750''
  • Connecting Rod Length: 5.700''
  • Deck Height: 9.025''
  • Compression Height: 1.433''
  • Pin Size: 0.9272''
  • Pin Location: Centered
  • Flat Top: -18cc 2 Symmetrical Valve Reliefs
  • Intake Valve Relief: 0.280'' Depth / 2.168'' Diameter
  • Exhaust Valve Relief: 0.280'' Depth / 2.168'' Diameter
  • Top Landing Height: 0.265''
  • Ring Grooves: 5/64'' Top; 5/64'' Middle; 3/16'' Bottom
  • Gram Weight: 543/145
  • Compression Ratio: 10.8:1 w/58cc Heads; 10.4:1 w/62cc Heads; 10.2:1 w/64cc; 9.1:1 w/76cc 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

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