Stock RA-IV cast iron heads flow 230 cfm at 25" of Test Pressure.
Edelbrock Aluminum RA-IV Heads will flow 280 cfm at 25" of test pressure STOCK and are lighter.
50 cfm increase per port does make a difference on an engine.
Tom V.
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"Engineers do stuff for reasons" Tom Vaught
Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward.
Last edited by Tom Vaught; 10-18-2019 at 05:55 PM.
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