Quote:
Originally Posted by 900HP
Headers are 1 3/4" step to 1 7/8" primary tube with 2 1/8" secondary tube. The collector choke is 2 1/2" tapering out to 3". All lengths were within an inch of target. Not shown in the photos are the 3" collector extensions we used, I *think* they were 11" long..... Not mentioned in the article was the 8" of crankcase vacuum we could pull with the pan-evac setup
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Here they are semi-finished
