Intake Opinions

I have only used one, the 4500 single plane made by Indy, 2" SuperSucker spacer and a 1140 cfm Dominator. With that combination on a 451 stroker it made 500+ lb-ft from 3,500-7,400 rpm w/ 604 lb-ft @ 6,100 rpm and 787 hp @ 7,200 rpm. Yes, on pump 91 octane.