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United Engine Machine KB124.030

Ford 351W Hypereutectic Pistons Flat Top

United Engine Machine KB124.030


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Estimated ship date 07/28/17 if Ordered Today
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United Engine Machine KB124.030 Ford 351W Hypereutectic Pistons Flat Top $264.99
Ford 351W Hypereutectic Pistons
  • Flat Top
  • 4.030'' Bore (+.030'')
  • Use w/5.956'' Connecting Rod & 3.500'' Crank Stroke
  • Comp. Ratio: 11.5/55cc; 10.8/60cc; 10.3/64cc; 9.7/69cc
  • 8/pkg

  • United Engine Machine KB124.030 Details

    Ford 351W

  • Flat Top Pistons
  • Technical Specs:
  • Alloy: Hypereutectic 390
  • Bore: 4.030''
  • Crankshaft Stroke: 3.500''
  • Connecting Rod Length: 5.956''
  • Deck Height: 9.500''
  • Compression Height: 1.774''
  • Pin Size: 0.9122''
  • Pin Location: Centered
  • Flat Top: -6.5cc 2V Relief
  • Intake Valve Relief: 0.257'' Depth / 2.120'' Diameter
  • Exhaust Valve Relief: 0.247'' Depth / 1.880'' Diameter
  • Top Landing Height: 0.275''
  • Ring Grooves: 1/16'' Top; 1/16'' Middle; 3/16'' Bottom
  • Gram Weight: 621/143
  • Compression Ratio: 11.5:1 w/55cc Heads; 10.8:1 w/60cc Heads; 10.3:1 w/64cc; 9.7:1 w/69cc Heads
  • For 1971-up blocks. Pre-1971 blocks .020'' shorter, not enough stock to clean up.

  • 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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