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In naturally aspirated trim, Aaron Macintosh's '93 Mustang GT produced 309 rwhp and 341 rwtq. Thanks to 10 psi of boost, our engine blasted the rollers at JPC Racing to a peak reading of 460 rwhp and 479 rwtq. It works out to a 155 rwhp and 138 rwtq gain from the Vortech H.O. kit.