1 3/4 or 1 7/8 headers
I think the 1 7/8" primaries are a little over kill unless going with a bigger cubed motor or a nasty setup.
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Go with the 1 3/4" lt and you'll be fine. If and when you decide to go larger keeps and actually need the 1 7/8's you can sell your small ones to recover some of your money. Since I've been on this site, I've seen it take no longer than 2-3 days to sell a set of Kooks and most sell within hours. JMO That's what I'm doing.
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