Keith Black KB172.040 Chevy 377/400 Flat Top Pistons .040 Over
Keith Black KB172.040 Chevy 377/400 Flat Top Pistons .040 Over
Keith Black

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#474172-040

Keith Black KB172.040 Chevy 377/400 Flat Top Pistons .040 Over

Oversize:

.040 Inch

$465.99

/set

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Product Summary

Flat Top w/ 2 valve reliefs Piston Style, 3.750" Stroke

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    Key Specs

    MFG. Part #KB172.040
    Piston StyleFlat Top w/ 2 valve reliefs
    Piston MaterialHypereutectic Aluminum
    Wrist Pin IncludedYes
    Wrist Pin StylePress-Fit or Floating
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    Keith Black KB172.040 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.

    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

    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

    Charts

    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

    Keith Black KB172.040 Specifications

    KEY SPECS
    MFG. Part #KB172.040
    BrandKeith Black
    Piston StyleFlat Top w/ 2 valve reliefs
    Piston MaterialHypereutectic Aluminum
    Wrist Pin IncludedYes
    Wrist Pin StylePress-Fit or Floating
    GENERAL
    Piston Diameter4.165"
    Stroke3.750"
    Connecting Rod Length5.700"
    Piston Weight580 grams
    Piston Ring StyleA
    Wrist Pin Diameter0.9272"
    Wrist Pin Weight145 grams
    Top Ring Thickness5/64"
    Second Ring Thickness5/64"
    Oil Ring Thickness3/16"
    Compression 58cc =11.5 : 1
    Compression 64cc =10.7 : 1
    Compression 76cc =9.4 : 1
    GTIN Code800745050922
    Sold in QuantitySet

    Questions & Answers

    1 Question • 1 Answer

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

    by Jeffery

    • 12 years ago

    1 answer

    View Answer

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