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United Engine Machine KB240KTM.STD

Chrysler 400ci Hypereutectic Pistons Flat Top

United Engine Machine KB240KTM.STD
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ON SALE - $176.29 OFF
United Engine Machine KB240KTM.STD Chrysler 400ci Hypereutectic Pistons Flat Top $385.36
Chrysler 400ci Hypereutectic Pistons
  • Flat Top
  • 4.342" Bore
  • Use w/ 6.358" Connecting Rods & 3.380" Stroke
  • Comp. Ratio: 10.3/72cc; 9.5/80cc; 9.2/84cc; 8.9/88cc
  • 8/pkg.

  • United Engine Machine KB240KTM.STD Details

    Chrysler 400ci

  • Flat Top Pistons

  • Bore: 4.342"
  • Rod Length: 6.358"
  • Pin Diameter: 1.0940"
  • Stroke: 3.380"
  • Comp. Ht: 1.908"
  • Top Land: 0.275"
  • OE Deck Height: 9.980"
  • Weight Piston/Pin: 660/190"
  • Head Type: Flat Top
  • Effective Head Volume: 8cc
  • Ext. Valve Depth: 0.264"
  • Ext. Valve Dia.: 2.360"
  • Int. Relief Depth: 0.264"
  • Int. Relief Dia.: 2.360"
  • Ring Packs: 2-5/64, 1-3/16

  • 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