Holley Terminator X GM LS Standalone ECU & Wire Harness 550-903 - 24x/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,...

FiTech Ultimate LS Standalone ECU & Wire Harness w/ Trans Control 70051 This kit comes with the ECU & Wire Harness only from the LS Ultimate EFI Inductions Systems. This kit does come with transmission control. This self-learning Ultimate LS...

FiTech Ultimate LS Standalone ECU & Wire Harness 70050 This kit comes with the ECU & Wire Harness only from the LS Ultimate EFI Inductions Systems. Does not have transmission control. This self-learning Ultimate LS ECU is the best solution for...