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408 Cubic Inches With A 350 Block

While the coarse stepped finish in the intake runner has almost no effect on airflow compared to a fine finish, the coarse finish does help break up fuel rivulets for a more combustible mixture.
408 Cubic Inches With A 350 Block - Stretching The Limits

While the coarse stepped finish in the intake runner has almost no effect on airflow compared to a fine finish, the coarse finish does help break up fuel rivulets for a more combustible mixture.  View Related Article

 

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