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More Performance throttle body mods boost airflow by about 150 cfm. First the vents in the wall are filled (upper left arrow) and re-drilled. The shaft is 'halved' (upper right) and the blade knife edged (lower arrow).
Corvette Crate Motor Curves

More Performance throttle body mods boost airflow by about 150 cfm. First the vents in the wall are filled (upper left arrow) and re-drilled. The shaft is 'halved' (upper right) and the blade knife edged (lower arrow).  View Related Article

 

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