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4-2-1 or 4-1 header

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i looked though the last 27 pages of topics....that took a while

but what i was looking for i couldnt find. a while back i remember there being decussions bout the different headers and which one is better for lower to mid rpm


im looking to buy a header next and want to get one that helps my lower rpm. so...which is it?


thanks in advance


(my intake comes tomorrow)

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