Vortech Supercharger Four Step Formula
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Back on the dyno with the smaller 3.33-inch pulley and a new tune from Johnson, it made 696 rwhp--a 15hp gain--and still at only 12 pounds of boost. From stock, it now makes 328-rwhp more--nearly double the power of a stock Boss--and on 93-octane pump gas. View Related Article
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