HP ECU AND HARNESS FOR LS1 & LS6 ENGINES
ECU & Harness Kits Looking for a plug and play alternative for your stock or built GM LS1 or LS6 late model factory EFI engine? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory GM LS1 or LS6 EFI engines as an alternative to the factory ECU and harness.
550-602 HP ECU AND HARNESS for LS1 & LS6 - 24x crank sensor
ECU, main harness, injector harness, and necessary sensors.
Injectors, fuel pumps, fuel lines and factory GM coil harnesses
Holley EFI Wiring Manual