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United Engine Machine IC999KTD.060

ICON Premium Forged Big Block Chevy 427/489ci Piston & Ring Set 4.310" Bore

United Engine Machine IC999KTD.060


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United Engine Machine IC999KTD.060 ICON Premium Forged Big Block Chevy 427/489ci Piston & Ring Set 4.310" Bore $713.99
Big Block Chevy 427/489ci Forged Pistons & Rings
  • Hollow Dome
  • 4.310" Bore (+.060)
  • 6.385/6.135" Connecting Rod
  • 3.760/4.250" Crank Stroke
  • -43cc Head Volume
  • Comp. Ratio: 11.4/119cc
  • 8/pkg

  • United Engine Machine IC999KTD.060 Details

    Chevy 427ci

  • Dome Top Pistons
  • Use w/6.385'' Connecti

    Technical Specs:

    • Alloy: Premium High Ductility 2618
    • Bore: 4.310"
    • Crankshaft Stroke (427ci): 3.760" (Must use  6.385" rod length)
    • Crankshaft Stroke (489ci)4.250" (Must use  6.135" rod length)
    • Connecting Rod Length (427ci): 6.385" (3.760" Stroke)
    • Connecting Rod Length (489ci): 6.135" (4.250" Stroke)
    • Deck Height: 9.800''
    • Compression Height: 1.520''
    • Pin Size: 0.990'' x 2.750"
    • Pin Location: Centered
    • Effective Head Volume: -43cc
    • Intake Valve Relief: 0.275'' Depth / 2.420'' Diameter
    • Exhaust Valve Relief: 0.000" Depth / 0.000" Diameter
    • Top Landing Height: 0.340"
    • Ring Grooves: 1/16'' Top; 1/16'' Middle; 3/16'' Bottom
    • Gram Weight: 668/141
    • Compression Ratio: 11.4:1/119cc
    • Will fit AFR, RHS, Trick Flow, World, Edelbrock, Brodix, Dart, and OE Chevy open chambered heads that are 118cc's or larger. Always check piston to chamber and valves to assure you have adequate opening clearance.
    • Moly Ductile Iron Ring Set 648-4250BD8 

  • Specifications:

    Manufacturer's Part Number:

    United Engine and Machine Company is proud to offer 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)

      Click here for reference guide to piston top designs