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Holley EFI Dominator EFI Connector J2A Auxiliary Harness 57850BK 1971 1974 GMC K15 K1500 Pickup GMC Sierra 1500 07 1971 1974 GMC K15 K1500 Pickup and BedXtender HD™ 23 user programmable input wires with pre crimped ECU pins Builders like Dave Lane who used Holley EFI to power the 2013 Goodguys Hot Rod of the Year and tuners like Steve Morris who use it to build some of the baddest forced induction beasts on the planet
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