Diamond 12957 Forged Pro-Filer Hitman 12 Degree Dome Pistons 4.625 Bore

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$976.95

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Part Number: DRP-12957

Manufacturer: Diamond

Quick Overview

Chevy BB, Bore 4.625, Stroke 4.750, Rod Length 6.700, Dome +10cc, Set of 8

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Diamond 12957 Forged Pro-Filer Hitman 12 Degree Dome Pistons 4.625 Bore

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Product Description

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  • Forged Diamond Dome Pistons for Pro-Filer "Hitman" 12 Degree Series Cylinder Heads. .043 .043 3/16 ring land with added gas ports for maximum ring seal. Compression ratios figured for .005" to .020" deck height @ 9.800" and 10.200" figured with 11.3cc gasket volume. Top ring moved down from piston crown .340". Valve relief depths .310" intake and .098" exhaust. Premium H-13 Tool Steel wrist pins are included.

    Compression Ratio with 64cc Heads 15.6:1
    Compression Ratio with 72cc Heads 14.4:1

    Additional Information

    SKU DRP-12957
    Manufacturer Diamond
    Vehicle Make Chevy BB
    Bore Size 4.625
    Wrist Pin Size 0.990
    Piston Material 2618 Forged
    Compression Height 1.120
    Piston Ring Size .043 .043 3/16
    Piston Type Dome +10cc
    Rod Length 6.700
    Crankshaft Stroke 4.750
    List price No
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