Product Summary

Flat Top w/ 2 valve reliefs Piston Style, 3.480" Stroke

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    Key Specs

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

    For S/B Chevy 305 c.i. (3.736" bore x 3.48" stroke).

    • 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

    C/R 58cc=10.0, 64cc=9.3, 76cc=8.2
    Piston/Pin Weight: 615 g
    Rod Length: 5.7", Ring Style: A

    Charts

    Specs

    • Comp Height 5.7" Rod -  1.561
    • Comp Height 6.0" Rod -  1.261
    • Pin Diameter -  0.9272

    CARB Warning

    For race/ off road use or for use on pre-1966 vehicles.

    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, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. 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.

    Specifications

    KEY SPECS
    MFG. Part #
    BrandKeith Black
    Piston StyleFlat Top w/ 2 valve reliefs
    Piston MaterialHypereutectic Aluminum
    Wrist Pin IncludedYes
    Wrist Pin StylePress-Fit or Floating
    GENERAL
    Piston Diameter
    Stroke3.480"
    Connecting Rod Length5.700"
    Piston Weight470 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 =10.0 : 1
    Compression 64cc =9.3 : 1
    Compression 76cc =8.2 : 1
    GTIN Code
    Sold in QuantitySet

    Ratings & Reviews

    5

    2 Reviews

    Overall Assessment

    Product reviews highlight the excellent quality and usability of our product, especially in engine builds. It proves ideal for customers working on specific projects, such as a Chevy 305, outperforming competitors in providing the required pistons. These features and its budget-friendly nature make it the favored choice, according to customers' recommendations.

    5

    2 reviews

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    This is a great produck

    5.0

    9 years ago

    Slowturtle

    Okeechobee, Fl.

    Verified

    Just right for my build. I wanted to build a Chevy 305, but finding the pistons was a job! A lot out there . These were just right for me. Thanks KB and Speedway

    Would Recommend

    Quality hidden by low price

    5.0

    10 years ago

    Dalemo

    Evansville, in

    Verified

    Building a budget minded racesaver engine and these fit the build nicely

    Would Recommend

    Showing 2 of 2 reviews

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