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Holley EFI Wiring Harness Dominator EFI Manual Transmissions & Components Image is for reference only WEI7155 Image is for reference only and shows model BB122E 9LSU wideband sensor and AEM X Series Wideband UEGO AFR Gauge with 4 see what the best are saying about Holley EFI Racers like Tom Bailey who set three new records and took the overall event win on the 2013 Hot Rod Magazine Drag Week and John Scali who used it to win the 2013 JEGS All Star race