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Part # 474122

KB Chevy 383 Hypereutectic Pistons, Flat Top, 6.0 Rod

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  • Made from 390 Hypereutectic alloy aluminum
  • Has fully machined crowns and valve reliefs
  • The reflective alloy allows for a 2% power increase

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$344.99

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$409.99

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Product Summary

383, Flat Top w/ 2 valve reliefs Piston Style

  • Made from 390 Hypereutectic alloy aluminum
  • Has fully machined crowns and valve reliefs
  • The reflective alloy allows for a 2% power increase
  • Unique quench dome technology minimizes deterioration
  • Features drilled oil drain backs and triple wound spiral locks

Key Specs

MFG. Part #
BrandKeith Black
Piston StyleFlat Top w/ 2 valve reliefs
Piston MaterialHypereutectic Aluminum

Need To Know

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Details

Keith Black Hypereutectic pistons are favored for their improved power and reduced scuffing. The unique design & manufacturing processes combine to produce a rigid piston, which will rock less in the bore improving ring seal. These T-5 heat treated pistons also offer reduced thermal expansion, which allows you to run tighter clearances and allows the piston rings to seal better and minimize blow-by.

  • 390 Hypereutectic alloy
  • 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
  • Lightweight wrist pins

For S/B Chevy 383 c.i. (4.000" bore x 3.75" stroke).

Item Details

C/R 58cc=11.9, 64cc=10.9, 76cc=9.6
Piston/Pin Weight: 570 g
Rod Length: 6.0", Ring Style: C

Charts

Specs

  • Comp Height 5.7" Rod -  1.433
  • Comp Height 6.0" Rod -  1.13
  • Pin Diameter -  0.9272

Specifications

KEY SPECS
MFG. Part #
BrandKeith Black
Piston StyleFlat Top w/ 2 valve reliefs
Piston MaterialHypereutectic Aluminum
GENERAL
Piston Diameter
Stroke3.750"
Connecting Rod Length6.000"
Piston Weight425 grams
Piston Ring StyleC
Wrist Pin Diameter0.9272"
Wrist Pin Weight145 grams
Compression 58cc =11.9 : 1
Compression 64cc =10.9 : 1
Compression 76cc =9.6 : 1
GTIN Code
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