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Old 09-17-2012, 04:18 PM
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Here is a pic of a fully ported 083 head.
You can see there is serious flow paths around the guide now.
These are not my heads but heads done at home by another guy who did not listen to the arm chair experts.
These 083 heads flow over 270cfm (2.08" valve)

When done generously @HOME with just a 1.94" valve they flowed over 240cfm.
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