Multi-Port EFI Kits

Holley Dominator EFI ECU Vehicle Management Systems 554-114 Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire, and dual wideband...

Holley HP EFI & Dominator EFI LS1/6 (24X/1X) Engine Main Harness, Extended Length 558-133 This harness is designed for LS1/6 Engines, from 1997-2004. This harness interfaces with 24x Crank and 1x Cam sensors. Plug and play with Dominator, HP,...

Holley EFI Terminator X Wideband Adapter Harness 558-463 Service harness sensor adapter for Terminator X and X Max ECU only.

Holley EFI LSX Injector Harness for EV6 Injectors HP EFI/Dominator/Terminator X 558-201 LSx Injector Harness for HP EFI, Dominator EFI and Terminator X.

Holley EFI LS1/LS6 (24X/1X) Engine Main Harness for HP EFI/Dominator EFI 558-102 This harness is designed for LS1/6 Engines, from 1997-2004. This harness interfaces with 24x Crank and 1x Cam sensors.

Holley GM Dominator Drive-by-Wire EFI Wiring Harness 558-406 Plug and Play with Holley Throttle Pedal Part Number - 145-160 Designed to work with GM Throttle body P/N's - 12570790 and 12580760 Designed to work with GM Throttle Pedal P/N - 10379038...

Holley EFI Dominator Multi Map Selector 558-407  

Dominator EFI Kit LS2 Main Harness w/ Trans, DBW w/ EV1 Injector Harness 550-660 Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by wire,...

Dominator EFI Kit LS2 Main Harness w/ Trans Control w/ EV1 Injector Harness 550-658 Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by...

Dominator EFI Kit LS2 Main Harness w/ Trans Control w/ EV1 Injector Harness 550-658 Fits GM LS 58x Crank, 4x Cam - 4.8/5.3/6.0 style Engines with EV1 Injectors, and a 4L60/80E Transmission Dominator® EFI Vehicle Management Systems are intended...

Dominator EFI Kit LS1 Main Harness w/ Trans Control, DBW w/ EV1 Injector Harness 550-657 Fits GM LS 24x Crank, 1x Cam - LS1/LS6 style Engines with EV1 Injectors a 4L60/80E Transmission, and a DBW Throttle Body. Dominator® EFI Vehicle Management...

Dominator EFI Kit LS1 Main Harness w/ Trans Control w/ EV1 Injector Harness 550-656 Dominator® EFI Vehicle Management Systems are intended for non-emissions street and racing engine applications. In addition to the transmission control, drive by...