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KB Performance Pistons KB398.030

Chevy 489ci Hypereutectic Pistons Dome Top .180"

KB Performance Pistons KB398.030

648-KB398.030

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Ships 12/14/16 if Ordered Today
KB Performance Pistons KB398.030 Chevy 489ci Hypereutectic Pistons Dome Top .180" $436.88
Chevy 489ci Hypereutectic Pistons
  • Dome Top .180''
  • 4.280'' Bore (+.030'')
  • Use w/6.385'' Connecting Rod & 4.250'' Crank Stroke
  • Comp. Ratio: 12.3/96.5cc; 11.3/105cc; 11.0/108cc; 10.0/119cc
  • 8/pkg

  • KB Performance Pistons KB398.030 Details

    Chevy 489ci

  • Flat Top Pistons
  • Use with Chevy 454 Block
  • Technical Specs:
  • Alloy: Hypereutectic 390
  • Bore: 4.280''
  • Crankshaft Stroke: 4.250''
  • Connecting Rod Length: 6.385''
  • Deck Height: 9.800''
  • Compression Height: 1.270''
  • Pin Size: 0.990''
  • Pin Location: Centered (Includes Spacer Ring)
  • Solid Dome Top: .180'' 17cc IV (Closed Chamber Head)
  • Intake Valve Relief: 0.266'' Depth / 2.310'' Diameter
  • Exhaust Valve Relief: N/A
  • Top Landing Height: 0.312''
  • Ring Grooves: 1/16'' Top; 1/16'' Middle; 3/16'' Bottom
  • Gram Weight: 570/158
  • Compression Ratio: 12.3:1 w/96.5cc Heads; 11.3:1 w/105cc Heads; 11.0:1 w/108cc; 10.0:1 w/119cc Heads

  • Specifications:

    Manufacturer's Part Number:
    KB398.030

    100% CNC Machined Pistons

    New high silicon alloys and diamond tooling have give Silv-O-Lite designers the material and equipment for performance breakthroughs in engine design. Silv-O-Lite 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.

    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

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