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KB Chevy 377/400 Hypereutectic Pistons, Flat Top, 5.7/5.565 Rod

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Specs
Sold in Quantity:
Set
Piston Ring Style:
A
Connecting Rod Length:
5.700"
Piston Material:
Hypereutectic Aluminum
Piston Style:
Flat Top w/ 2 valve reliefs
Compression 58cc =:
11.5 : 1
Compression 64cc =:
10.7 : 1
Compression 76cc =:
9.4 : 1
Piston Diameter:
-
Stroke:
3.75
Wrist Pin Diameter:
.9272
Piston Weight:
580
Wrist Pin Weight:
145
MFG. Part #:
-
KB Chevy 377/400 Hypereutectic Pistons, Flat Top, 5.7/5.565 Rod

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Details

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Q & A (1)

What's in the Box

Info

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.

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").

  • 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

Ring Style Chart (GIF)

474-172 Instructions (PDF)

Item Details

(377) C/R 58cc=11.5, 64cc=10.7, 76cc=9.4
(400) C/R 58cc=12.3, 64cc=11.4, 76cc=10.1
Piston/Pin Weight: 580 g
Rod Length: 5.7(377), 5.565(400)
Ring Style: A

Specs

  • Comp Height 5.565" Rod -  1.561
  • Comp Height 5.7" Rod -  1.433
  • Comp Height 6.0" Rod -  1.13
  • Pin Diameter -  0.9272

Customer Reviews

This product has no reviews.

Product Q&A

1 questions : 1 answers

1 answers

Will this set work with part #91515383 ? I have a 350 ci, 64cc heads, stock connecting rods ( 5.7" )

Jeffery
November 03, 2013

Will this set work with part #91515383 ? I have a 350 ci, 64cc heads, stock connecting rods ( 5.7" )

Answers

November 04, 2013
Jason
This KB hyperutectic piston is made for the small block chevy 400 block(4.125" bore). It will work with the 3.48" stroke crank and a 5.7" rod or the 3.75" stroke crank and a 5.565" rod. Piston set #474134 will work with the 350 block(4.00" bore) and the 3.75" stroke crank with 5.7" rod.
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