Engine Management & Tuning

HOLLEY

Holley Efi Terminator X Without Touchscreen - Gm Ls1/Ls6 - Ev6 Injectors

Seize command of your LS engine with Terminator X! Reject the notion of settling for a salvage yard ECU burdened with a cumbersome tuning interface when you can attain total control over your engine. With self-learning fuel strategies and the race-proven...

HOLLEY

Holley Efi Terminator X Without Touchscreen - Gen 3 4.8/5.3/6.0 Truck Engine

Seize command of your LS engine with Terminator X! Don't settle for a lackluster junkyard ECU with a cumbersome tuning interface when you can wield complete control over your engine, harness self-learning fuel strategies, and access the proven,...

HOLLEY

Holley Efi Terminator X Without Touchscreen - Gen 4 4.8/5.3/6.0 Truck Engine

Take charge of your LS engine with Terminator X! Say no to a salvage yard ECU with a clunky tuning interface when you can enjoy complete control of your engine, self-learning fuel strategies, and the race-proven technology of Holley EFI—all at an...