Product Summary

400, Dome Piston Style, 4.155" Piston Diameter

    Key Specs

    MFG. Part #
    Piston StyleDome
    Piston MaterialHypereutectic Aluminum
    Wrist Pin IncludedYes
    Wrist Pin StylePress-Fit or Floating

    Need To Know

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    Keith Black Hyperutectic 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 400 c.i. (4.125" bore x 3.75" stroke).

    Item Details

    C/R 58cc=14.5, 64cc=13.3, 76cc=11.4
    Piston Weight: 583 g
    Rod Length: 5.7", Ring Style: A



    • 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

    CARB Warning

    For race/ off road use only

    Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


    MFG. Part #
    BrandKeith Black
    Garage Sale TypeCloseout
    Piston StyleDome
    Piston MaterialHypereutectic Aluminum
    Wrist Pin IncludedYes
    Wrist Pin StylePress-Fit or Floating
    Piston Diameter4.155"
    Dome Height.100"
    Connecting Rod Length5.700"
    Piston Weight583 grams
    Piston Ring StyleA
    Wrist Pin Diameter0.9272"
    Wrist Pin Weight145 grams
    Compression 58cc =14.5 : 1
    Compression 64cc =13.3 : 1
    GTIN Code
    Sold in QuantitySet