291cc intake runners and 69cc combustion chambers. These are new head castings that WE CNC Machine and assemble, that is why and how we have no issues!, bolt on performance and reliability! with expert people who assemble the heads for trouble free service.
Valve covers tall New 4.3 Chevy V6 will clear roller rockers 262 v-6 Vortec
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Mopar Big Block Erson 1.6 Ratio Roller Rocker Arms Set of 16 - New
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Chevrolet LS7 LS3 291cc 69cc New Assembled Aluminum Cylinder Heads Pro Header
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