Thread: AFR heads out perform GT40X heads even after porting, polishing, milling & cam swap
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Old 11-02-2010, 11:29 AM
Excaliber Excaliber is offline
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18 degree heads? Can you enlighten us as to what those are?

From the flow numbers I've seen there are a few heads that will outflow the AFR's at high rpm. But those that do show poor numbers when compared to AFR in the lower and mid rpm range's.
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