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United Engine Machine KB416.030

Chrysler 408ci Hypereutectic Pistons Stepped Dish

United Engine Machine KB416.030


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Estimated ship date 04/02/18 if Ordered Today
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United Engine Machine KB416.030 Chrysler 408ci Hypereutectic Pistons Stepped Dish $378.99
Chrysler 408ci Hypereutectic Pistons
  • Stepped Dish
  • 4.030'' Bore (+.030'')
  • Use w/6.123'' Connecting Rod & 4.000" Crank Stroke
  • Comp. Ratio: 9.8/62cc; 9.6/64cc; 9.3/68cc; 8.9/72cc
  • 8/pkg

  • United Engine Machine KB416.030 Details

    Chrysler 408ci

  • Step Dish Pistons
  • Note: Technical Specs:
  • Alloy: Hypereutectic 390
  • Bore: 4.030''
  • Crankshaft Stroke: 4.000"
  • Connecting Rod Length: 6.123''
  • Deck Height: 9.599''
  • Compression Height: 1.465''
  • Pin Size: 0.9842''
  • Pin Location: Centered
  • Step Dish: 25cc no quench dome
  • Intake Valve Relief: 0.286'' Depth / 2.200'' Diameter
  • Exhaust Valve Relief: 0.286'' Depth / 2.200'' Diameter
  • Top Landing Height: 0.275''
  • Ring Grooves: 5/64'' Top; 5/64'' Middle; 3/16'' Bottom
  • Gram Weight: 478/132
  • Compression Ratio: 9.8:1 w/62cc Heads; 9.6:1 w/64cc Heads; 9.3:1 w/68cc Heads; 8.9:1 w/72cc Heads

  • 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