JE 257947 Forged Inverted Dome Pistons 4.500 Bore

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Availability: Out of stock


Part Number: JE-257947_1

Manufacturer: JE

Quick Overview

Big Block Chevy 509, Bore 4.500, Stroke 4.000, Rod Length 6.385, Inverted Dome -28cc, 591 Grams, Set of 8

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JE 257947 Forged Inverted Dome Pistons 4.500 Bore

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Product Description

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  • These big block pistons are compatible with forced induction, nitrous and angle milled heads. The inverted dome shape has been designed for maximum efficiency and horsepower. Valve reliefs will accommodate oversized valves and long duration, tight lobe separation cams. Compression Height figured using 9.780 block height with zero deck clearance. Precision CNC machined ring grooves accept 1/16, 1/16, 3/16 rings. Will fit both open and closed chamber cylinder heads. Pin #990-2930-18-51S (174g), and double spiro locks #990-042-CS are included.

    Compression Ratio with 118cc Heads 7.6:1
    Compression Ratio with 124cc Heads 7.4:1

    Additional Information

    SKU JE-257947_1
    Manufacturer JE
    Vehicle Make Chevy BB
    Bore Size 4.500
    Wrist Pin Size 0.990
    Piston Material 2618 Forged
    Compression Height 1.395
    Piston Ring Size 1/16 1/16 3/16
    Piston Type Inverted Dome -28cc
    Rod Length 6.385
    Crankshaft Stroke 4.000
    List price No
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