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KB Chevy 377/400 Hypereutectic Pistons, .150 Dome, 5.7/5.565 Rod
KB Chevy 377/400 Hypereutectic Pistons, .150 Dome, 5.7/5.565 Rod

KB Chevy 377/400 Hypereutectic Pistons, .150 Dome, 5.7/5.565 Rod

377 Chevy Small Block V8, 400 Chevy Small Block V8, Hypereutectic Aluminum Piston Material

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KB Chevy 377/400 Hypereutectic Pistons, .150 Dome, 5.7/5.565 Rod
KB Chevy 377/400 Hypereutectic Pistons, .150 Dome, 5.7/5.565 Rod
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Part # 474182
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  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.


Piston Material:
Hypereutectic Aluminum
Piston Style:
Piston Diameter:
Select Oversize to see
Dome Height:
Connecting Rod Length:
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Piston Ring Style:
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Wrist Pin Diameter:
Piston Weight:
605 grams
Wrist Pin Weight:
145 grams
Compression 58cc =:
13.2 : 1
Compression 64cc =:
12.1 : 1
Compression 76cc =:
10.5 : 1
Sold in Quantity:
MFG. Part #:
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GTIN Code:
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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 Chevy 377 c.i. (4.125" bore x 3.48" stroke x 5.7" rod) and Chevy 400 c.i. (4.125" bore x 3.75" stroke x 5.565").  . 

Ring Style Chart (GIF)

474-182 Instructions (PDF)

Item Details

(377) C/R 58cc=13.2, 64cc=12.1, 76cc=10.5
(400) C/R 58cc=14.1, 64cc=13.0, 76cc=11.2
Piston/Pin Weight: 605 g
Rod Length: 5.7(377), 5.565(400)
Ring Style: C


  • Comp Height 5.7" Rod -  1.561
  • Comp Height 6.0" Rod -  1.261
  • Pin Diameter -  0.9272
Some parts are not legal for use in California or other states with similar laws/regulations

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