EQ318B Magnum heads discontinued ?

Freezerman said

That sucks. Speedmaster has the air gap magnum style intake on sale right now for $135 if you get the ch318a heads instead.

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Hey old thread and all but what is the speed master part number? The ch318a doesn’t come up and couldn’t find magnum heads on their site. What you described is exactly what I’m after. Thanks for the help.