440 Source Head Opinions?
Stealth heads with the seats recut and a nice bowl blend with flow right about
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Most home ported stock heads(especially 906’s and 915’s) I’ve tested are typically in the 250 and less range.
The
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On my bench an ootb TF240 flows right about 316/
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I’ve tested about a dozen of them, they’ve all been within a few cfm.