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Ford 351C Hypereutectic Pistons Flat Top
InfoVehicle Info Needed
UNITED ENGINE MACHINEPART NUMBER: 648-KB177.030

Ford 351C Hypereutectic Pistons Flat Top

$42997
ShippingShips on 11/10/2026
Lowest PriceLowest Price Guarantee

Ford 351C
  • Flat Top Pistons
      • Ford 351C Hypereutectic Pistons
    • Flat Top
    • 4.030'' Bore (+.030'')
    • Use w/5.778'' Connecting Rod & 3.500'' Crank Stroke
    • Comp. Ratio: 11.1/62cc; 10.6/66cc; 9.5/76cc
    • 8/pkg

      Technical Specs:
    • Alloy: Hypereutectic 390
    • Bore: 4.030'
    • Crankshaft Stroke: 3.500'
    • Connecting Rod Length: 5.778'
    • Deck Height: 9.206'
    • Compression Height: 1.670'
    • Pin Size: 0.9122'
    • Pin Location: Centered
    • Flat Top: -2cc 1V
    • Intake Valve Relief: 0.148' Depth / 2.470' Diameter
    • Exhaust Valve Relief: N/A
    • Top Landing Height: 0.301'
    • Ring Grooves: 5/64' Top; 5/64' Middle; 3/16' Bottom
    • Gram Weight: 582/143
    • Compression Ratio: 11.1:1 w/62cc Heads; 10.6:1 w/66cc Heads; 9.5:1 w/76cc Heads
    • For 1971-up blocks. Pre-1971 blocks .020' shorter, not enough stock to clean up.

    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 pistons are 100% CNC machined and T-6 heat treated from 16%-18% silicon 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 Ford Pistons
    BrandUNITED ENGINE MACHINE
    Package Height4.7
    Package Width9.3
    Package Length18.1
    Weight13.14 PG
    Part CategoryPerformance Parts
    Part FitmentSemi Universal
    Vendor Part NumberKB177.030
    Package Qty1
    Package TypeEA
    Please click here to download the instructions PDF file

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