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United Engine Machine Big Block Ford 520/545ci Forged Piston

United Engine Machine IC854.030
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United Engine Machine Big Block Ford 520/545ci Forged Piston $584.99
Big Block Ford 520/545ci Forged Pistons
  • Step Dish Top
  • 4.390'' Bore (+.030'')
  • 8/pkg

  • United Engine Machine IC854.030 Details

    Dish Pistons

    Technical Specs:

    • Alloy: Premium High Ductility 2618
    • Bore: 4.390'' (+.030")
    • Crankshaft Stroke: 4.300/4.500''
    • Connecting Rod Length: 6.800/6.700"
    • Deck Height: 10.320''
    • Compression Height: 1.350''
    • Pin Size: 0.990'' x 2.750''
    • Pin Location: Centered
    • Step Dish Top: .210'' 39cc 
    • Intake Valve Relief: 0.245'' Depth / 2.450'' Diameter
    • Exhaust Valve Relief: N/A
    • Top Landing Height: 0.328''
    • Ring Grooves: 1/16'' Top; 1/16'' Middle; 3/16'' Bottom
    • Gram Weight: 627/141
    • Compression Ratio 520: 9.8:1 w/72cc Heads; 9.6:1 w/75cc Heads; 8.8:1 w/88cc
    • Compression Ratio 545: 10.2:1 w/72cc Heads; 10:1 w/75cc Heads; 9.2:1 w/88cc
    • Designed for O.E. and Edelbrock style cylinder heads with 460 block.
    • Can be used for 520ci with 4.300" stroke crank and 6.800" rod
    • Can be used for 545ci with 4.500" stroke crank and 6.700" rod


    Manufacturer's Part Number:

    United Engine and Machine Company is proud to introduce the Icon line of forged pistons. Icon brings the same quality and performance you've come to expect from other United Engine brands while adding a new lightweight forged design. No matter your high performance application, there is an Icon piston for you.


    • High ductility 2618 alloy
    • Perfect for Nitrous, Turbocharged and Supercharged Apps
    • Dual forced pin oiling on most applications
    • Lateral gas porting on higher compression ratios
    • Fully machined with deep valve pockets
    • Second land accumulator grooves
    • Top land mini groove technology
    • Diamond finished skirts
    • Triple wound spiral locks
    • Spacer rings included in short compression heights that intersect the wrist pin bore
    • Sold in Sets (except when noted as 1 piston per package)

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