Multi-Port EFI Kits

Holley Terminator X GM LS Standalone ECU & Wire Harness 550-910 - 58x/EV1 Take control of your LS engine with Terminator X! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine,...

Holley Terminator X GM LS Standalone ECU & Wire Harness 550-909 - 24x/EV6 Take control of your LS engine with Terminator X! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine,...

Holley Terminator X Max GM LS Standalone ECU & Wire Harness 550-929 - 24x/EV1/DBW Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your...

Holley Terminator X Max GM LS Standalone ECU & Wire Harness 550-930 - 24x/Multec 2/DBW Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your...

Holley Terminator X Max GM LS Standalone ECU & Wire Harness 550-926 - 24x/EV1/Trans Control/DBW Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete...

Holley Terminator X Max GM LS Standalone ECU & Wire Harness 550-927 - 24x/Multec 2/Trans Control/DBW Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have...

Holley Terminator X Max GM LS Standalone ECU & Wire Harness 550-931 - 58x/EV6/DBW Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of...

Holley Terminator X Max GM LS Standalone ECU & Wire Harness 550-918 - 58x/EV6/Trans Control Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete...

Holley Terminator X Max GM LS Standalone ECU & Wire Harness 550-928 - 58x/EV6/Trans Control/DBW Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete...

Holley Terminator X Max GM LS Standalone ECU & Wire Harness 550-917 - 24x/Multec 2/Trans Control Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete...

Holley Terminator X Max GM LS Standalone ECU & Wire Harness 550-916 - 24x/EV1/Trans Control Take control of your LS engine with Terminator X Max! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete...

Holley Terminator X GM LS Standalone ECU & Wire Harness 550-905 - 58x/EV6 Take control of your LS engine with Terminator X! Don't settle for a junkyard ECU with a cumbersome tuning interface when you can have complete control of your engine,...