Pontiac Cylinder Head Packages - Cylinder Head Symphony
In addition to port work that increases peak intake airflow to 300 cfm, B.P. also adds a 1.77-inch exhaust valve, polishes the combustion chambers, and assembles the castings using high-quality valvetrain components. Additional porting and a 2.19-inch intake valve are a few of the available extra-cost options. View Related Article
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