Big Block Open Chamber Dome - Standard/Tall Deck Block Forged Piston J258233 Product:Big Block Chevy 509, 4.500" bore, 6.535" rod length, 42.0cc dome volu Product Features: Buna N O-rings

Product Features: Buna N O-rings for a positive seal O-ring seal eliminates the need for a gasket or sealant Uses 1-1/2” I

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060" Locator ThicknessLocator O

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Big Block Open Chamber Dome - Standard/Tall Deck Block Forged Piston J258233 Product:Big Block Chevy 509, 4.500" bore, 6.535" rod length, 42.0cc dome volu Product Features: Buna N O-ringsBig Block Open Chamber Dome Standard Tall Deck Block Forged PistonBig Block Chevy 509, 4. 500" bore, 6. 535" rod length, 42. 0cc dome volume J258233 58233 These big block pistons are an excellent choice for drag race applications. These pistons will not work with Edelbrock heads ED6045, ED6040, ED6055, pistons for these heads are available as special order. Precision CNC machined ring grooves accept 1 16, 1 16, 3 16 rings. Includes : Double pin oilers